System Optimizer: what it is and how to remove it
System Optimizer is the potentially unwanted program that supposedly offers disk optimization and registry cleaning features, but there is no particular reason to keep the PUP on the machine. It gets promoted on various platforms with advertisements claiming that tool updates drivers, delete temp files, and reports system errors.
Facts checked October 6, 2026. Removal steps tested on Windows 11 (26H2) and checked against Microsoft's and the browser makers' current documentation. Sections marked as our earlier report are the original text: they describe the threat as it was then and have not been reviewed since. The 2026 status, the removal steps and the questions are current.
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System Optimizer: summary
| Distribution | The more common way that such intruders get spread is using software bundles[2] during insecure freeware installations. Also, deceptive pages that promote the tool also trick people into installing the program or triggers the automatic download |
|---|---|
| Name | System Optimizer |
| Type | System tool or potentially unwanted program. It also can get categorized as a rogue application[1] |
| Symptoms | There are not many particular symptoms or activities that this PUA runs on the machine. However, the suspicious scan of the system is initiated and altered, pre-determined results appear on the screen alongside additional advertisements and shady installations |
| Danger | PUP can trick you into installing or paying for the licensed version of the application that does nothing like the free version. Such cyber threats can get involved with ad-supported pages and advertisers that collect and misuse information about you, browsing habits and preferences |
| Detection names | No Microsoft detection name is known |
| Removal | Scan the PC with security software to find and remove the malware and anything installed with it. Fortect scans Windows for malware and repairs the system files and settings it damaged. Remove it nowTo use the full-featured product, you have to purchase a license for Fortect. The scan is free. |
Show 5 more facts
| Damage | Not recorded in the old report |
|---|---|
| Evidence | 4 write-ups by security sites; details still limited |
| Program | System Optimizer |
| First seen | 28 February 2020 |
| Facts checked | 6 October 2026 |
Is System Optimizer a real security program?
From our report of Feb 2020 · not reviewed since
System Optimizer is the unwanted program that claims to clean the registry and fix all the errors this way
System Optimizer is the potentially unwanted program that supposedly offers disk optimization and registry cleaning features, but there is no particular reason to keep the PUP on the machine.
It gets promoted on various platforms with advertisements claiming that tool updates drivers, delete temp files, and reports system errors. However, the said cleaning functions are not real, and, in most cases, clearing registry entries and so on can affect the performance even more than the cyber infection initially did.
This PUP can get called a System Optimizer virus by users that get affected by the shady tool because it appears out of nowhere and triggers unwanted processes, questionable scans, or delivers results not related to the machine affected. All the functionalities should apply for Windows devices mainly, but there are a few distributors, deceptive sites that push the mobile version of this program.
It is possible, that adware-related application is distributed on various operating systems and can frustrate people all over the globe, so be cautious when you receive any suspicious malware alerts or scan results from a tool that you haven't installed yourself.
System Optimizer focuses on showing exaggerated results of the system scan with various claims about system errors or even malware infections. However, the free version of the application has no functionalities that could help with the detected problems, so you get suggested to install a full version of the tool or pay for the licensed version that potentially is also useless.
System Optimizer can also be categorized as adware because the computer starts showing ads and redirects when it gets installed or finds its own way on the targeted machine. If you noticed additional pop-up ads, promotional material, banners, or redirects to questionable advertising services, take actions ASAP to avoid serious infiltrations of malware and damage to your system.
System Optimizer is a questionable program, which claims that it is capable of increasing PC's speed and improving its functionality. Unfortunately, but we can't guarantee that after eliminating all bad registries and suspicious files that will be found by this program you will improve your PC's speed.
That's because you have to get rid of thousands of bad registries in order to see a clear improvement in your PC's work.
Also, you can definitely do that for free with the help of reputable and well-known software, so why should you install and then purchase this suspicious application. You better get or a similar cleaner instead of the rogue System Optimizer for such system issues or even virus damage termination.
As we have noticed, this program is mostly used for making the money, which means that it seeks the only thing - trick you into buying its license. Beware that most System Optimizer scam results and alerts can be exaggerated and may have nothing in common with the real situation of your computer.
Experts note that you shouldn't believe anything that appears on the screen out of nowhere, especially such alerts or malware warnings. In most cases, System Optimizer removal is the only cleaning process that you need to perform because all the claims on the pre-determined list are fake and not related to your machine.
In addition, it should be known that this application may infiltrate your computer in a bundle with other programs and then start showing you its questionable alerts without a break. How can you avoid System Optimizer infiltration? The easiest way to do that - start monitoring the installation of every freeware because there are thousands of free programs that have been involved in the distribution of additional components.
To sum up, System Optimizer is a very questionable application, which should be used with extreme carefulness. If you know that you have never downloaded this program to your computer, you should get rid of it. The easiest way to do that is to download a reputable anti-malware tool that can detect various cyber intruders and clean them off of your device.
Such security programs should also help you to detect hidden components of the shady tool and avoid reappearance of this questionable program. So remove System Optimizer as soon as you can and make sure to choose the proper anti-malware program to have the one-time experience of terminating the PUP and forget about all those frustrating symptoms.
From our report of Feb 2020 · not reviewed since
More from our earlier report on System Optimizer
- Make sure to remove System Optimizer ass soon as you notice any of the symptoms, so you can avoid further damage that PUA can make to your system and programs or features
- You need to consider additional cleaning of the machine and repairing particular files and functions because PUP can easily alter parts or even cause damage.
- To repair affected files get or a different cleaner utility
How System Optimizer got on your PC
From our report of Feb 2020 · not reviewed since
These tools can be installed by the users themselves because when PUP is actively it is promoted, you can easily fall for those useful claims and allegations.
However, you should avoid its official website and other sites that have been involved in its distribution and promotional campaigns.
In addition, as we have already mentioned, you have to be very careful when downloading free programs on your computer because there are lots of applications that have been involved in the distribution of this and other suspicious applications. You should be careful when downloading download managers, PDF creators, video streaming software, video recording software, and similar applications.
Basically, the first step that you should do is to read the end user's license agreement, privacy policy, and similar information. In addition, make sure you select the Custom or Advanced installation option and then follow every installation step of the freeware. Once you see a warning about optional components, you should uncheck each of them because they may lead you to the infiltration of a virus.
How to remove System Optimizer
Nothing it reports is real.
These steps remove it and undo a payment if you made one.
Step 1: Do not pay, and undo a payment if you made one
Nothing that System Optimizer says it found needs fixing by System Optimizer. Close its windows and do not enter card details.
If you bought it, contact your bank or card issuer about a dispute and cancel any renewal, keeping the receipt e-mail as evidence. Uninstalling it from Windows 11 or Windows 10 removes the program but leaves the subscription running.
Full procedure with screenshots: What to do after paying a scammer
Step 2: Uninstall System Optimizer
System Optimizer is removed like any other program, from the list of installed apps. In Windows 11 that is Settings > Apps > Installed apps, in Windows 10 Settings > Apps > Apps & features, and in both you can also use Control Panel > Programs and Features.
Select System Optimizer, click Uninstall and follow the uninstaller to the end. Then look at the entries just above and below it when the list is sorted by date: bundled programs install at the same minute.
Full procedure with screenshots: Uninstall a program or app in Windows On uGetFix
Step 3: Remove it from startup
Press Ctrl + Shift + Esc to open Task Manager and select Startup apps (Windows 11) or the Startup tab (Windows 10). Disable entries you do not recognise, especially ones with no publisher or with a name that copies a Windows component.
Right-click an entry and choose Open file location to see where it runs from: programs in
%AppData%or%Temp%deserve a closer look. Some entries are not listed there but in the registry Run keys, which the procedure below shows how to check.Full procedure with screenshots: Stop apps from opening at startup On uGetFix
Step 4: Delete the folders left behind
Uninstalling often leaves the program's folders, and some threats reinstall themselves from them.
Press Windows + R, type
%LocalAppData%and press Enter, then do the same for%AppData%and %ProgramData%, and look for folders named after System Optimizer, its publisher or created on the day the problem started.Delete those folders, and check
C:\Program FilesandC:\Program Files (x86)too.If Windows says a file is in use, end it in Task Manager or delete the folder after a restart in Safe Mode. The folders are the same in Windows 11 and Windows 10.
Full procedure with screenshots: Remove what malware leaves behind in Windows
Step 5: Scan the PC, then run the offline scan
A scan finds the parts of System Optimizer that the manual steps cannot see. In Windows Security > Virus & threat protection > Scan options, start a Full scan and quarantine what it reports.
Follow it with Microsoft Defender Antivirus (offline scan) > Scan now, which restarts the PC and checks the disk while Windows and the malware are not running.
It takes about 15 minutes and works the same in Windows 11 and Windows 10. If either scan finds something, run the full scan again after removal until it comes back clean.
Windows 11: Windows Security > Virus & threat protection > Scan options. Full procedure with screenshots: Run a Microsoft Defender Offline scan
Instructions for each browser and system
The detailed steps for every browser and system this guide covers. Open the one you use.
Uninstall from Windows
Get rid of the shady System Optimizer PUP by following these steps
Uninstall from Windows 10/8:
- Type Control Panel into the Windows search box and open the result.
- Under Programs, select Uninstall a program.
Uninstall from Windows 7/XP:
- Click on Windows Start > Control Panel (Windows XP users should click on Add/Remove Programs).
- In Control Panel, select Programs > Uninstall a program.
Remove the unwanted program:
- In the Programs and Features window, look for any recently installed suspicious entries, select them, and click Uninstall.
- If User Account Control appears, click Yes to confirm, then complete the removal.
Remove from Google Chrome
You should reset the browser to default, so all the changes made without your permission can be changed back to normal
Delete malicious extensions from Google Chrome:
- Open Google Chrome, click on the Menu (three vertical dots at the top-right corner) and select More tools > Extensions.
- In the newly opened window, you will see all the installed extensions. Uninstall all suspicious extensions related to the unwanted program by clicking Remove.
Clear cache and web data from Chrome:
- Click on Menu and pick Settings.
- Under Privacy and security, select Clear browsing data.
- Select Browsing history, Cookies and other site data, as well as Cached images and files.
- Click Clear data.
Change your homepage:
- Click menu and choose Settings.
- Look for a suspicious site in the On startup section.
- Click on Open a specific or set of pages and click on three dots to find the Remove option.
Reset Google Chrome:
If the previous methods did not help you, reset Google Chrome to eliminate all the unwanted components:
- Click on Menu and select Settings.
- In the Settings, scroll down and click Advanced.
- Scroll down and locate Reset and clean up section.
- Now click Restore settings to their original defaults.
- Confirm with Reset settings.
Remove from Microsoft Edge
Delete unwanted extensions from MS Edge:
- Select Menu (three horizontal dots at the top-right of the browser window) and pick Extensions.
- From the list, pick the extension and click on the Gear icon.
- Click Remove.
Clear cookies and other browser data:
- Click on the Menu (three horizontal dots at the top-right of the browser window) and select Settings > Privacy, search, and services..
- Under Clear browsing data, pick Choose what to clear.
- Select Cookies and other site data and Cached images and files. (apart from passwords, although you might want to include Media licenses as well, if applicable) and click on Clear.
Restore new tab and homepage settings:
- Click the menu icon and choose Settings.
- Then find On startup section.
- Click Remove next to any suspicious startup page.
Reset MS Edge if the above steps did not work:
- Press on Ctrl + Shift + Esc to open Task Manager.
- Click on More details arrow at the bottom of the window.
- Select Details tab.
- Now scroll down and locate every entry with Microsoft Edge name in it. Right-click on each of them and select End Task to stop MS Edge from running.
Delete extensions from MS Edge (Chromium):
- Open Edge and click select Settings > Extensions.
- Delete unwanted extensions by clicking Remove.
Clear cache and site data:
- Click on Menu and go to Settings.
- Select Privacy, search and services.
- Under Clear browsing data, pick Choose what to clear.
- Under Time range, pick All time.
- Select Clear now.
Reset Chromium-based MS Edge:
- Click on Menu and select Settings.
- On the left side, pick Reset settings.
- Select Restore settings to their default values.
- Confirm with Reset.
- This will disable extensions and reset startup pages but will not delete bookmarks, saved passwords, or browsing history.
Remove from Mozilla Firefox (FF)
To clean all the traces of System Optimizer, you can fully reset the Firefox browser
Remove dangerous extensions:
- Open Mozilla Firefox browser and click on the Menu (three horizontal lines at the top-right of the window).
- Select Add-ons.
- In here, select the unwanted extension and click Remove.
Reset the homepage:
- Click three horizontal lines at the top right corner to open the menu.
- Choose Settings.
- Under Home, set your preferred homepage and new tab settings.
Clear cookies and site data:
- Click Menu and pick Settings.
- Go to Privacy & Security section.
- Scroll down to locate Cookies and Site Data.
- Click on Clear Data...
- Select Cookies and Site Data and Temporary cached files and pages, then click Clear.
Reset Mozilla Firefox
If clearing the browser as explained above did not help, reset Mozilla Firefox:
- Open Mozilla Firefox browser and click the Menu.
- Go to Help and then choose Troubleshooting Information.
- Under Give Firefox a tune up section, click on Refresh Firefox...
- Once the pop-up shows up, confirm the action by pressing on Refresh Firefox.
Delete from Safari
Remove dangerous extensions:
- Open Safari, click Safari in the menu at the top-left of the screen, and select Preferences.
- Go to the Extensions tab, look for any suspicious entries, and click Uninstall to remove them.
Clear history and website data:
- Click Safari in the menu and pick Clear History.
- Set Clear to all history and confirm with Clear History.
Reset Safari:
- Click Safari in the menu and select Preferences > Advanced.
- Enable Show Develop menu in menu bar.
- From the menu bar, click Develop and select Empty Caches.
Delete from macOS
Remove the unwanted application:
- From the menu bar, select Go > Applications.
- In the Applications folder, look for any suspicious entries, then drag them to Trash (or right-click and pick Move to Trash).
Delete leftover files and folders:
- Select Go > Go to Folder.
- Enter /Library/Application Support and remove any suspicious folders related to the unwanted program.
- Repeat the same check in the /Library/LaunchAgents and /Library/LaunchDaemons folders, deleting any suspicious entries.
- Finally, empty the Trash to permanently remove the leftovers.
Reset Internet Explorer
Remove dangerous add-ons:
- Open Internet Explorer, click on the Gear icon (IE menu) on the top-right corner of the browser
- Pick Manage Add-ons.
- You will see a Manage Add-ons window. Here, look for suspicious plugins. Click on these entries and select Disable.
Change your homepage if it was altered:
- Open IE and click on the Gear icon.
- Select Internet Options.
- In the General tab, delete the Home page address and replace it by your preferred one (for example, Google.com).
- Click Apply and then select OK.
Delete temporary files:
- Press on the Gear icon and select Internet Options.
- Under Browsing history, click Delete...
- Select relevant fields and press Delete.
Reset Internet Explorer:
- Click on Gear icon > Internet options and select Advanced tab.
- Select Reset.
- In the new window, check Delete personal settings and select Reset.
Choose a proper web browser and improve your safety with a VPN tool
Online spying has got momentum in recent years and people are getting more and more interested in how to protect their privacy online.
One of the basic means to add a layer of security - choose the most private and secure web browser. Although web browsers can't grant full privacy protection and security, some of them are much better at sandboxing, HTTPS upgrading, active content blocking, tracking blocking, phishing protection, and similar privacy-oriented features.
However, if you want true anonymity, we suggest you employ a powerful VPN - it can encrypt all the traffic that comes and goes out of your computer, preventing tracking completely.
Lost your files? Use data recovery software
While some files located on any computer are replaceable or useless, others can be extremely valuable.
Family photos, work documents, school projects - these are types of files that we don't want to lose. Unfortunately, there are many ways how unexpected data loss can occur:
- power cuts
- Blue Screen of Death errors
- hardware failures
- crypto-malware attack
- even accidental deletion
To ensure that all the files remain intact, you should prepare regular data backups. You can choose cloud-based or physical copies you could restore from later in case of a disaster. If your backups were lost as well or you never bothered to prepare any, can be your only hope to retrieve your invaluable files.
From our report of Feb 2020 · not reviewed since
Focus on system cleaning and remove the System Optimizer virus as soon as possible
If the System Optimizer virus has already shown up on your computer, you should get rid of it.
You can do that with the help of anti-malware programs designed to scan the machine fully and indicate any risks regarding the performance, speed, or even malware infections. You may benefit from some tips listed below.
You may also try to go for the manual System Optimizer removal process by resetting all web browsers on the machine to default. This is how all of the changes made by this intruder gets reversed and additionally installed extensions or tools deleted.
However, the best way to remove System Optimizer from your device is the anti-malware software that is based on detecting malicious activities and possibly dangerous programs. AV engines can find parts of the shady software in various places of the system and even the ones that are hidden in the background, so your device gets properly cleaned.
Questions about System Optimizer
What is System Optimizer and why is it on my PC?
System Optimizer is a program that was installed on the PC, most likely together with something else you downloaded. Free software sites and many installers add extra programs on setup pages with pre-ticked boxes, so the extra install looks like your choice even though nobody read the page.
Check the install date in Settings, Apps, Installed apps: the program you installed that day is the probable carrier. If you do not need System Optimizer, uninstall it. If it belongs to your hardware or to a program you use, search its exact name and publisher first, because drivers and their tools can have unfamiliar names.
System Optimizer came back after I uninstalled it. Why?
Something else is reinstalling it. Common causes are a second program from the same publisher, a scheduled task that downloads it again, or a browser extension that keeps prompting for it. Sort Installed apps by install date and uninstall each entry from the same day that you did not choose.
Then open Task Scheduler and look in the Task Scheduler Library for tasks with updater-style names that you do not recognise. Check Startup apps in Task Manager too. If System Optimizer still returns, start Windows in Safe Mode, uninstall it there and run a Microsoft Defender offline scan, which looks for loaders that ordinary scans can miss.
Is System Optimizer an antivirus?
No. It looks like one, with a shield, a scan and a list of threats, but System Optimizer is a rogue antivirus: its scans are designed to find something every time, and every fix leads to a payment page.
A real antivirus detects the same threats consistently, removes them without asking for money first and does not block other security tools. Windows 11 and Windows 10 already include Microsoft Defender in Windows Security, which is enough for most home users. Remove System Optimizer and keep Defender on.
Is Windows Security enough to protect me from programs like System Optimizer?
For most home users, yes, especially with Potentially unwanted app blocking turned on in Windows Security > App & browser control > Reputation-based protection settings. That setting blocks many scareware installers before they run.
No security tool stops every scam, though, because programs like System Optimizer are usually installed by the user after a frightening message. The habit that helps most is simple: ignore any website or pop-up that claims to have scanned your PC, and never call a number shown in a warning.
Is my card safe after buying System Optimizer?
Treat it as exposed. The order page belongs to the seller of System Optimizer, and you cannot know how the number is stored or shared. Ask your bank for a replacement card, which is usually free, and dispute the original charge as a misrepresented product.
Until the new card arrives, check your account daily for small or foreign transactions. If the bank offers alerts for every card payment, turn them on. Keep the receipt and screenshots, because they support the dispute.
Someone called offering a refund for System Optimizer. Is it genuine?
Almost certainly not. Refund calls are a well-known second stage of scareware and tech support scams. The caller says you are owed money, asks you to install a remote access program to "process" it, then opens your online banking, makes it look as if too much was refunded and asks you to send the difference back.
Hang up. Real refunds go back to the card or PayPal account you paid with, through your bank or the payment provider, and never need remote access or a gift card.
Is System Optimizer a real Windows warning?
No. Real Windows Security notifications appear in the notification area and in the Windows Security app, use Microsoft's design and never ask you to call a phone number or pay to fix anything. What people report is system Optimizer in the list of installed apps, drawn by a program that copies the look of a system message.
Open Windows Security from the Start menu to see the real status of your PC. If it shows no threats while the window keeps appearing, the window itself is the problem, and the plan in this guide removes the program that shows it.
Did System Optimizer steal my information?
Not by itself, as far as reports show. Programs that display system Optimizer in the list of installed apps are built to scare people into paying or calling; they rarely take data on their own.
The risk comes from what you did in response: typing card details into the program, or letting a caller connect to your PC. If you did neither, uninstalling the program is enough. If you did either, treat that information as exposed:
- block the card
- change passwords from another device
- remove any remote-access tool that was installed
What could the caller do while connected to my PC?
Anything you could do. Callers working with fake alerts like System Optimizer typically show you Windows logs as "proof", install their own remote tool for later, and steer you to online banking or a gift card purchase. Some add a password to Windows or lock the PC if you refuse to pay.
Remove every remote access program you did not install yourself, check Settings > Accounts > Other users for new accounts, and change important passwords from a clean device. If you cannot be sure what was changed, a reset of Windows is the safe choice.
Will Fortect remove System Optimizer?
Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything.
For System Optimizer, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.
Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.
Sources
- Wikipedia: Rogue security software (read October 6, 2026)
- ZDNet: Google: Unwanted bundled software is way more aggressive than malware (read October 6, 2026)
- Virusai: Virusai (read October 6, 2026)
- FTC: How to recognize, remove and avoid malware (read October 6, 2026)
- Microsoft Learn: Microsoft Defender Offline (read October 6, 2026)
