WinSnare virus: what it is and how to remove it
WinSnare virus can be very annoying and can keep installing on your Windows 10 or another operating system without your approval. That's because it has been spreading in a bundle with a bunch of components, including winsnare.dll.
Facts checked October 7, 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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WinSnare virus: summary
| Names | WinSnare |
|---|---|
| The latest version | 4.0.8 |
| Category | Adware |
| Operating systems affected | Windows XP, 7, 8, 10 |
| Distribution methods | Travels together with free software as optional component, attaches itself to torrent files and other downloads. |
| Symptoms of infiltration | Changes the start page on the browser, causes pop-up ads and fake alerts, slows down the browser. |
| 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 10 more facts
| Removal methods | Manual and automatic removal methods |
|---|---|
| Detection names | No Microsoft detection name is known |
| Damage | Not recorded in the old report |
| Name | WinSnare virus |
| Type | Adware extension |
| Symptoms | An unknown program in Installed apps |
| Evidence | 7 write-ups by security sites; details still limited |
| Program | WinSnare virus |
| First seen | 14 June 2021 |
| Facts checked | 7 October 2026 |
Is WinSnare virus dangerous?
From our report of Jun 2021 · not reviewed since
WinSnare - virus capable of installing on system without any permission asked
WinSnare virus can be very annoying and can keep installing on your Windows 10 or another operating system without your approval.
That's because it has been spreading in a bundle with a bunch of components, including winsnare.dll. Each of these components has to be removed at once if you want to get rid of this potentially unwanted program for good. Otherwise, it can reappear right after rebooting the system.
Mostly, Win Snare operates as adware: after installing automatically, it starts causing commercial ads on all web browsers that can be seen during your searches. However, this PUP can also track information on the target computer and send logs to a remote server . Taking into account this feature, the malware can be considered a hacking tool as well.
You can spot this virus by the .dll command in the Task Manager or C:\Windows\System32\svchost.exe -k process running in the background. If you found any of these, make sure you remove the virus because data-tracking activities should not be tolerated or ignored if you value your data confidentiality. Access to your personal computer can help the offenders to steal your private information .
The title of this PUP may remind you of Snare (System Intrusion Analysis and Reporting Environment) - the collection of software that focuses on the decentralization of data log files. The latter program was devised by InterSect Alliance International Pty Ltd. However, WinSnare has nothing in common with the mentioned PUP.
In reality, the app is closely related to amuleC virus, another potentially unwanted program which is based on the well-known legitimate program eMule. Besides, there have been claims that it is related to startpageing123 virus and can be installed with its help.
From our report of Jun 2021 · not reviewed since
Main facts about this virus
We do not recommend choosing the manual removal option if you are not an experienced PC user.
This task can not only be troublesome for you but can also end up with more troubles on your computer. Besides, this potentially unwanted program (PUP) spreads together with other potentially unwanted programs, so you need to know each name to uninstall it fully.
If your antivirus detects this PUP, most likely, it will detect all potentially unwanted programs, like adware and browser hijackers, that could be related to this virus. To save your time, we suggest choosing the WinSnare removal tool to run a full system scan and remove all components that are essential for this adware to function.
How WinSnare virus got into your browser
From our report of Jun 2021 · not reviewed since
Adware is spread just like any other unwanted software - it can hijack your computer when you rush through some program's installation steps without unchecking conditions that grant this PUP access to the system. Therefore, we suggest you act more attentively when installing random programs from the Internet .
There is a simple misconception about the right installation settings - most computer users believe that Default, Standard, or Recommended settings are the most trustworthy ones. However, this is entirely incorrect, and you should opt only for the Custom or Advanced installation option. Otherwise, you can fall for installing bundled components.
Software bundling allows the developers of potentially unwanted programs (such as Win Snare) to group their products with legitimate software and spread them together. In most cases, it turns out that these apps are ad-supported and that they cause only unpleasant activities on the target system.
Agreements to install them are usually hidden under the Default or Standard installation settings, so the next time you install something from the Internet, make sure you choose the Custom or Advanced installation option. Of course, you should also remove ticks under the suggestions to install unknown third-party software. Also, we must mention that there is a risk of infecting the system with similar programs when installing pirated software.
How to remove WinSnare virus
How to remove the WinSnare virus extension
Do the browser steps in every browser and profile on the PC, then check Windows for the program that installed the extension.
Step 1: Remove extensions you did not add
In Chrome open
chrome://extensions, in Edgeedge://extensions, and in Firefox the menu > Extensions and themes.Remove every extension you do not remember adding, especially search, new tab, coupon, PDF, weather or video downloader add-ons. Check every browser and every profile, because each keeps its own list.
If an extension has no Remove button or comes back, a browser policy holds it (see "Managed by your organization" in the procedure below). The pages are the same on Windows 11 and Windows 10.
Chrome on Windows 11: More > Extensions > Manage extensions. Full procedure with screenshots: Remove a browser extension
Step 2: Uninstall WinSnare virus
WinSnare virus 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 WinSnare virus, 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: Reset the browser
A reset removes what the steps above could miss:
- changed start pages
- site permissions
- hidden settings
In Chrome open Settings > Reset settings > Restore settings to their original defaults; in Edge Settings > Reset settings; in Firefox Help > More troubleshooting information > Refresh Firefox.
Tip: Bookmarks and saved passwords stay, while extensions are turned off and the search engine and start page return to the defaults.
Reset every browser on the PC, including Edge, which Windows 11 and Windows 10 always have.
Chrome on Windows 11: Settings > Reset settings. Full procedure with screenshots: Reset a browser and fix a hijacked search engine
Step 4: Scan the PC, then run the offline scan
A scan finds the parts of WinSnare virus 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
To remove adware from Windows, make sure you use these basic instructions. Do not forget to scan the system afterward to check if there are any suspicious files or applications that you missed.
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
To fix Google Chrome after the hijack, make sure you reset the browser to remove this PUP from your computer. However, keep in mind that this program has mostly been spreading together with other shady programs, and the easiest way to clean your computer is to allow anti-spyware program to delete all PUPs and malware at once
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)
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.
Access your website securely from any location
When you work on the domain, site, blog, or different project that requires constant management, content creation, or coding, you may need to connect to the server and content management service more often. The best solution for creating a tighter network could be a dedicated/fixed IP address.
If you make your IP address static and set to your device, you can connect to the CMS from any location and do not create any additional issues for the server or network manager that needs to monitor connections and activities. VPN software providers like can help you with such settings and offer the option to control the online reputation and manage projects easily from any part of the world.
Recover files after data-affecting malware attacks
While much of the data can be accidentally deleted due to various reasons, malware is one of the main culprits that can cause loss of pictures, documents, videos, and other important files.
More serious malware infections lead to significant data loss when your documents, system files, and images get encrypted. In particular, ransomware is is a type of malware that focuses on such functions, so your files become useless without an ability to access them.
Even though there is little to no possibility to recover after file-locking threats, some applications have features for data recovery in the system. In some cases, can also help to recover at least some portion of your data after data-locking virus infection or general cyber infection.
From our report of Jun 2021 · not reviewed since
WinSnare removal techniques
As we have already mentioned, there are two ways that you can use to remove the virus from your computer.
Firstly, you can run a full system scan with your anti-virus or anti-spyware and get rid of every entry that is marked as unsafe or malicious. However, sometimes one antivirus programs fail to detect threats like this adware after the scan. In this case, it is advisable to update the software to its full version or use an alternative anti-malware.
You may also want to take a look at the removal instructions given below. They will help you eliminate any present adware scripts and tracking tools manually. Note that there is also WinSnare 4.0.8 version roaming on the web, which hides its files from the user. To uncover them, follow these steps:
You should also check your Program Files and Program Data Folders for suspicious files that could be related to this virus. Make sure that you inspect both of your drives, C: and D:. Finally, if you can still notice ads on your web browser, you should go to "Appdata" folder and delete your profile for this web browser.
- Open Control Panel and go to Appearance and Personalization -> Folder Options
- Go to View tab and select Show hidden files, folders and drives and uncheck Hide extensions for known file types. Click Apply to save these changes.
- Now click Windows Key and R at the same time to launch Run and enter %temp%. After hitting Enter button, you should find yourself in a new directory.
- Select each of temporary files that can be seen here and delete them.
Questions about WinSnare virus
What is WinSnare virus and why is it on my PC?
WinSnare virus 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 WinSnare virus, 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.
WinSnare virus 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 WinSnare virus 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.
I clicked on one of the ads. Am I infected?
Probably not. Clicking an ad usually only opens a page, and a page cannot install programs on an up-to-date Windows PC without your help.
You are at risk only if you then downloaded and ran a file, allowed notifications, entered card or login details, or called a phone number shown on the page. Delete any download and run a full and offline scan.
Change passwords you typed, from a clean device. Call your bank if you gave card details. If you called a number or allowed remote access, see the next question.
An ad showed a phone number and I called it. What now?
The number belongs to scammers, not to Microsoft or an antivirus company. If you only talked, hang up and do not call back. If you let them connect to the PC, disconnect it from the internet, uninstall the remote access program they used, such as AnyDesk, TeamViewer, ScreenConnect or UltraViewer, and run a full and offline scan.
If you paid or gave bank details, call your bank at once on the number printed on your card. Change any passwords you typed while they were connected, and report the call.
Can adware slow down my PC?
Yes. Adware runs in the background, loads ad scripts, opens extra tabs and contacts its servers, all of which use processor time, memory and bandwidth. Ad-heavy extensions also slow down every page, because they inspect and change it before you see it.
The effect is strongest on older PCs and when several adware programs arrived together. After removal, restart the PC and check Task Manager for anything still using a lot of resources that you do not recognise. Speed usually returns to normal once the ads stop.
Does adware steal passwords?
Ordinary adware is built to show ads, not to steal logins, and most of it never touches saved passwords. The line is blurry, though. Extensions that can read every page could capture what you type, and adware ads sometimes lead to phishing pages that ask for passwords directly.
If you entered credentials on a page reached through an ad, change that password from a clean device and turn on two-step verification. Otherwise, removing adware extension and clearing cookies is usually enough.
Why didn't my antivirus catch WinSnare virus?
Many security products do not block adware or notification sites by default, because users often agreed to them, even through a misleading prompt. Notification spam installs nothing at all, so there is no file to detect.
In Windows 11 you can make Microsoft Defender block potentially unwanted apps: open Windows Security > App & browser control > Reputation-based protection settings and turn on Potentially unwanted app blocking. If notifications caused the pop-ups, no scanner will report them; the fix is in the browser's site settings.
How did WinSnare get on my computer?
Our report lists the distribution as travels together with free software as optional component, attaches itself to torrent files and other downloads. Software of this kind often comes bundled with free programs, fake updates or downloads from unofficial sites.
It can also arrive through a browser extension or a notification you allowed on a spam page. Think back to what you installed or allowed just before the first ad or redirect appeared.
Will Fortect remove WinSnare virus?
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 WinSnare virus, 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
- Lifehacker: What to Do When Someone Gets Unauthorized Access to Your Computer (read October 7, 2026)
- Wikipedia: What is Snare (software)? (read October 7, 2026)
- Wikipedia: Browser hijacking (read October 7, 2026)
- How-To Geek: How to Avoid Installing Junk Programs When Downloading Free Software (read October 7, 2026)
- Google Chrome Help: Use notifications to get alerts (no longer online) (read October 7, 2026)