K9-PCFixer: what it is and how to remove it
K9-PCFixer is advertised as a system tool that will improve your computer's performance by defragmenting Windows Registry, cleaning junk files, and so on. However, more than a few anti-malware engines have flagged two of its files as potentially malicious.
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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K9-PCFixer: summary
| Distribution | Official websites, fake Flash updaters or installers, freeware bundles, deceptive ads |
|---|---|
| name | K9-PCFixer |
| Type | PUA, rogue system tool |
| Symptoms | Fake errors, slower device performance |
| Aim | To show bloated or phony results to convince into buying a licensed version |
| Issues | Money loss, infections with PUPs |
| 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 7 more facts
| Detection names | No Microsoft detection name is known |
|---|---|
| Damage | Not recorded in the old report |
| Name | K9-PCFixer |
| Evidence | 4 write-ups by security sites; details still limited |
| Program | K9-PCFixer |
| First seen | 26 February 2021 |
| Facts checked | 6 October 2026 |
Is K9-PCFixer a real security program?
From our report of Feb 2021 · not reviewed since
K9-PCFixer – a software showing phony scan results to promote its paid version
K9-PCFixer is advertised as a system tool that will improve your computer's performance by defragmenting Windows Registry, cleaning junk files, and so on.
However, more than a few anti-malware engines have flagged two of its files as potentially malicious. Thus users should think twice before downloading and using this piece of software.
In some cases, users don't know how K9-PCFixer ended up on their device. That's because shady techniques can be used for its distribution, such as deceptive ads, fake Flash installations, software bundles, etc. Besides, this application could install random add-ons or promote other useless software.
Due to all of this, this software is categorized as a potentially unwanted program, or PUP for short. If you want to find out more about this product, its peculiarities, distribution techniques, fake reports, and removal options, continue reading this article.
There's a bunch of software advertised to increase your internet speed, boost your device performance by tenfold, and other misleading claims. Applications like PC HelpSoft Driver Updater, Driver Support, PC Gold Optimizer, and alike are usually useless tools.
They generate a list of issues that may include malware infections, Registry problems, enormous amounts of junk files, and other phony system issues. By doing that, such PUPs try to convince the users that there's something wrong with their devices and that they need to buy a licensed version of such tools like K9-PCFixer that would fix all issues.
When in reality, users would be stuck with a worthless piece of software that does nothing at all apart from slowing down the device. The paid version of K9-PCFixer only cleans the list of detections and claims it fixed issues. Please don't fall for such tricks as there is nothing wrong with your device. These are tactics used to scare gullible people.
Although K9-PCFixer PUP claims it will fix some errors, we highly advise getting rid of the shady tool.
Open either of those free security tools and scan the whole device system. Once the scan is finished, remove K9-PCFixer with all of its pieces. Please keep your anti-malware software's virus databases updated at all times so it could prevent you from visiting malicious pages and installing shady applications.
As great as security tools are at safeguarding your device and eliminating cyber threats, they can't do everything. After K9-PCFixer removal, you have to fix your Registry because the PUPs entries could still be there. You can do it manually, but IT experts suggest using the tool to do that automatically.
From our report of Feb 2021 · not reviewed since
Mischievous advertisement lead to the installation of useless tools
There are tons of various applications offered through promotional websites claiming to be the best app to detect malware, update drivers, fix the Registry, clean junk files, and so on and so forth. Some of them might be useful, but most of them are worthless.
Please don't fall for advertiser tricks that state that your computer or phone will be ten times faster or that you'll be able to download something from the internet immediately. These are pure lies made up to convince you to download shady software.
In most cases, these deceptive applications show bogus results for malware infections, Registry problems, out-dated software, system updates, etc. These exaggerated results are meant to push you into paying for the licensed version that would do absolutely nothing.
How to remove K9-PCFixer
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
K9-PCFixer reports problems to sell a licence: the "threats" or "errors" it lists are invented or harmless leftovers. If you already paid, ask your card issuer to dispute the charge and cancel the subscription both in the seller's account and through your bank.
If you called a phone number it showed and let someone connect, treat the PC as remotely accessed and remove the remote tool. Uninstalling it from Windows 11 or Windows 10 does not cancel a subscription by itself.
Full procedure with screenshots: What to do after paying a scammer
Step 2: Uninstall K9-PCFixer
Open Settings > Apps > Installed apps in Windows 11, or Settings > Apps > Apps & features in Windows 10. Sort the list by install date and find K9-PCFixer, then choose Uninstall from the three-dot menu next to it (in Windows 10, click the entry and then Uninstall).
Remove anything else installed on the same day that you do not recognise, because such programs usually arrive together in one installer. If the uninstaller opens a browser page with an offer or a survey, close it: the program is removed either way.
Full procedure with screenshots: Uninstall a program or app in Windows On uGetFix
Step 3: Remove it from startup
Whatever K9-PCFixer installed usually starts with Windows. Open Task Manager with Ctrl + Shift + Esc, go to Startup apps in Windows 11 or the Startup tab in Windows 10, and disable what you do not know, starting with entries that have an empty Publisher column.
Open file location on the right-click menu shows the file, which helps you decide and tells you what to delete later. Disabling is safe: if something you need stops working, switch it back on.
Full procedure with screenshots: Stop apps from opening at startup On uGetFix
Step 4: Delete the folders left behind
What the uninstaller leaves behind is usually in the user folders. Open File Explorer, switch on View > Show > Hidden items (in Windows 10 View > Hidden items), and go through
%LocalAppData%,%AppData%, %ProgramData% and the two Program Files folders.Sort by Date modified and delete folders that appeared together with the problem and belong to no program you use. Folders with random names that hold
.exe,.dll, .js or .ps1 files are the strongest sign.Full procedure with screenshots: Remove what malware leaves behind in Windows
Step 5: Scan the PC, then run the offline scan
Open Windows Security > Virus & threat protection > Scan options, run a Full scan and remove everything it finds. Then select Microsoft Defender Antivirus (offline scan) and click Scan now: the PC restarts and scans before Windows loads, which finds files that hide while Windows runs.
Save your work first, because the offline scan takes about 15 minutes. Both scans are built into Windows 11 and Windows 10, and a second scanner from another vendor is a useful extra opinion.
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
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.
Do not let government spy on you
The government has many issues in regards to tracking users' data and spying on citizens, so you should take this into consideration and learn more about shady information gathering practices.
Avoid any unwanted government tracking or spying by going totally anonymous on the internet.
You can choose a different location when you go online and access any material you want without particular content restrictions. You can easily enjoy internet connection without any risks of being hacked by using VPN.
Control the information that can be accessed by government any other unwanted party and surf online without being spied on. Even if you are not involved in illegal activities or trust your selection of services, platforms, be suspicious for your own security and take precautionary measures by using the VPN service.
Backup files for the later use, in case of the malware attack
Computer users can suffer from data losses due to cyber infections or their own faulty doings.
Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact - you can set this process to be performed automatically.
When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use for the data restoration process.
From our report of Feb 2021 · not reviewed since
Remove K9-PCFixer and other PUPs to restore system performance
Potentially unwanted programs can claim to improve many aspects of your device, but in reality, all they do is slow down the machine.
This is why the K9-PCFixer virus is the name that frustrated users use for this app. Sometimes they can show intrusive ads, cause redirects, and harshly impede browsing or working. These types of programs shouldn't be installed on anyone's device.
Either uninstall this PUP manually or use our recommendations and eliminate it with the help of professional anti-malware software to ensure it's completely gone.
Afterward, use proper system diagnostic tools to check whether K9-PCFixer removal was successful and remove any Registry entries. Modified system settings might lead to crashing, freezing, severe lag, BSoD, and other system irregularities.
Questions about K9-PCFixer
Is K9-PCFixer a virus?
Most programs that appear the way K9-PCFixer did are not viruses in the strict sense. They are potentially unwanted programs:
- real software that arrives bundled with other downloads and then shows offers
- changes browser settings
- starts with Windows
Some are harmless, some are annoying and a few carry adware. What makes it worth removing is that you did not choose it.
Uninstall it from Installed apps and check the startup list and the browsers for anything added the same day. If it refuses to uninstall or returns after a restart, treat it as more serious and run a Microsoft Defender offline scan.
K9-PCFixer will not uninstall. What can I do?
First restart the PC and try again, because the program may have been running and locked its own files. If the uninstaller is missing or fails, start Windows in Safe Mode, where most third-party programs do not start, and remove K9-PCFixer from Installed apps there.
If it still refuses, delete its startup entry and its scheduled task, restart, and try once more. A program that actively prevents removal is behaving like malware, so finish with a Microsoft Defender offline scan. Avoid third-party uninstallers offered on search ads; several of them are unwanted programs themselves.
How do I know K9-PCFixer is fake?
Three things give it away. It appears as K9-PCFixer in the list of installed apps, a window from a program rather than from Windows Security. It pushes you to act quickly by calling, paying or downloading.
And the threats it reports never show up when you run a scan in the real Windows Security app. Microsoft does not put phone numbers in warnings or charge for removing threats through pop-ups. Close the window, do not call, and follow the steps to find and uninstall the program behind it.
What is K9-PCFixer?
K9-PCFixer is fake security software, sometimes called a rogue antivirus or scareware. The program, K9-PCFixer, shows invented or exaggerated problems to make you pay for a licence, and some versions send you to phone "support".
It does not protect the PC, and the threats it lists are not a reason to pay. Fake security programs usually arrive through fake virus warnings on websites, extra offers in free installers or ads for faster PCs. Uninstall it and use the free protection built into Windows instead.
Should I reset my PC because of K9-PCFixer?
Only if the signs point to deeper access. Reset when you see K9-PCFixer in the list of installed apps again after removal, when Windows Security cannot start or update, when remote access tools you did not install keep appearing, or when you simply cannot trust the PC any more.
Otherwise, the plan in this guide plus an offline scan is enough. If you do reset, choose Remove everything and Cloud download for a fresh copy of Windows, restore only documents and photos, and reinstall programs from their official sites. Change important passwords from the clean system afterwards.
Will the seller of K9-PCFixer refund me if I ask?
Sometimes, but do not depend on it and do not let them steer the process. If you contact the seller, do it in writing and keep the replies. Never install software, share your screen or give banking details to get a refund.
The more reliable route is your card issuer or PayPal: a chargeback or dispute for a product sold with false claims. If the seller or anyone claiming to represent them calls you first about a refund, treat it as a scam and hang up.
Did K9-PCFixer steal my information?
Not by itself, as far as reports show. Programs that display K9-PCFixer 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
Do I need to buy antivirus after removing K9-PCFixer?
No. Windows 11 and Windows 10 include Microsoft Defender in Windows Security, which provides real-time protection, scheduled scans, the offline scan and protection against unwanted apps at no cost. Keep it switched on and updated, and turn on Reputation-based protection under App & browser control.
If you prefer a third-party product, buy it from the vendor's own site after reading independent test results, never from a pop-up or a phone call. The lesson of K9-PCFixer is that security offers which arrive unasked are the ones to avoid.
I let a technician connect to my PC because of K9-PCFixer. Is it safe now?
Not until you check. While connected, the caller could install other programs, create a user account or look at saved passwords. Disconnect from the internet, uninstall the remote access program and anything else installed during the call, and run a full scan and the Microsoft Defender offline scan.
From another device, change your e-mail and banking passwords and turn on two-step verification. If the caller opened your online banking, call the bank today. A reset of Windows is the safest option if you cannot tell what was done.
Will Fortect remove K9-PCFixer?
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 K9-PCFixer, 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: Potentially unwanted program (read October 6, 2026)
- Virukset: Virukset (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)
- Microsoft Learn: How Microsoft names malware (read October 6, 2026)