CosstMinn Ads Removal Tool & Removal Guide

CosstMinn Removal


What is CosstMinn Extension:

Threat Classification: PUP/adware

CosstMinn Extension is an add-on for Internet Explorer, Firefox and Chrome. It is considered as a PUP (potentially unwanted program) and/or adware program which display pop-up boxes, advertisements and sponsored links when browsing on the internet. CosstMinn Extension loads unwanted advertisements on a random webpage that you visit. The PUP will show ads into all well-known browsers like Internet Explorer, Mozilla Firefox and Google Chrome. They will state: “brought to you by Ads by CosstMinn Extension”. CosstMinn Extension will highlight random words on webpages that you visit converting them into hyperlinks. The links replace the original text. They also come with a double underline stand out from the rest. Every time your mouse goes over a link – an ad will pop out.

Generally, users that have it installed on their systems might see different pop-ups, banners, search suggestions, sponsored link advertisements displayed on popular pages. You might also see a little button referring you to similar products which will be offered by the PUP. The search results can also be altered, displaying information loaded with spam and third-party advertising. Currently CosstMinn adware program displays at least four basic types of advertising including sponsored links, coupons, deals and banner ads, “pop-unders” or interstitial ads. Usually they are labeled as “Ads by CosstMinn”, “CosstMinn Ads”, “CosstMinn Deals”, CosstMinn Coupons, “Powered by CosstMinn”, “Brought by CosstMinn”

CosstMinn Extension is usually bundled with other free software products and is being installed by default when the user accepts the EULA while performing an express/recommended installation of that software. The possible distribution of CosstMinn Extension varies but is not limited to – installing third-party toolbars, free software products, downloading e-mail attachments, clicking on ads or banners etc..

The purpose of CosstMinn Extension is to attract more users to their domains so that the creators of such or similar adware or malware could generate income from online traffic, and would collect information that might be used to compromise the user. CosstMinn Extension may use cookies and other relevant information to steal your personal details. That is the reason why this malware infection should not be left unattended, and it needs to be terminated immediately, as it is a serious threat to your online security.

!!! Please note that these infections could potentially bring up other malware to your computer and even cause a loss of data. Please do not underestimate such threats.

Removal Process:

There are two ways to remove this infection. It is totally up to you to decide which way you want to go:

1. Automatic Removal Method (recommended for regular or novice users) using a Professional Malware Removal Software.

2. Free Manual Removal (recommended for PC Experts or Enthusiasts).

Automatic CosstMinn Extension Removal:

We recommend using SpyHunter Malware Security Suite.

You can download and install SpyHunter to detect CostMin Extension and remove it, by clicking the button below. Once installed, SpyHunter will automatically scan and detect all threats present on your system, but in order to use it as a removal tool, you need to purchase a subscription.

Learn more about SpyHunter (EULA). You can find Install Instructions here: (LINK) SpyHunter`s free diagnosis offers free scans and detection. You can remove the detected files, processes and registry entries manually, by yourself, or purchase the full version to perform an automatic removal and also to receive free professional help with any malware related queries by their technical support department.
Manual CosstMinn Extension Removal:

!!! Please note: You can remove CosstMinn Extension PUP manually, however, you should proceed at your own risk, as any of the interventions might render your system inoperable. Therefore this manual removal method is highly recommended for PC Experts or Enthusiasts. For regular users, recommends using SpyHunter or any other reputable security application.

1. Remove CosstMinn Extension Uninstall Entry:

First, you can try to go to Control panel and click on Programs and Features (Windows Vista/7/8/10) or Add/Remove Programs (Windows XP) and check the Uninstall Programs` List for any entry related to CosstMinn, CostMin Extension/AdPeak, Level Quality Watchers, 1ClickDownload, Yontoo and FBPhotoZoom, Superfish or any third-party add-ons, extensions and toolbars. If you find such, double-click on it and try to remove it. Although, please mind that this is an actual infection and you might not be able to remove it directly from the list.

*(Start -> Control Panel -> Programs and Features or Add/Remove Programs) or “Win + R” keys to open “Run” and type in “control”, then hit enter.

2. Remove CosstMinn Extension from your browser:

Internet Explorer: 

Go to Tools -> Internet options -> Advanced Tab and click the Reset button (make sure to select the Delete Personal Settings checkbox).

*please note that in order to save your favorites, you need to export them before resetting the browser as you will lose all personal settings.

After IE completes the operation, click the close button and then close IE in order for the changes to take effect.

Google Chrome:

Go to the following path (you can copy-paste it) and delete the entire folder “Chrome” with all the folders and files that are in it.

For Windows XP: %USERPROFILE%\Local Settings\Application Data\Google\

For Windows Vista/7/8/10: %USERPROFILE%\AppData\Local\Google\

Alternatively, you can navigate to these folders by following these steps:

For Windows XP:

1. Click on “Start” in the lower-left portion of the screen.

2. Choose “Run”. 3. Type %USERPROFILE%\Local Settings\Application Data\Google\   and hit Enter.

For Windows Vista/7/8/10:

1. Click on the Windows logo in the lower-left portion of the screen.

2. Type %USERPROFILE%\AppData\Local\Google\   and hit Enter

Mozilla Firefox:

1. At the top of the Firefox window (upper-left corner), click the Firefox button, go over to the Help sub-menu and select Troubleshooting Information.

2. Click the Reset Firefox button in the top-right corner of the Troubleshooting Information page.

3. To continue, click Reset Firefox in the confirmation window that opens.

4. Firefox will close and be reset. When it’s done, a window will list the information that was imported. Click Finish and Firefox will reopen.

3. Check for arguments added by CosstMinn Extension in any Browser shortcuts or links to web pages:

CosstMinn Extension might also hijack your web browser shortcuts in order to force-load its home page. This causes the CosstMinn Extension`s web page to open up when you launch a hijacked shortcut.

The argument that CosstMinn Extension uses in order to hijack shortcuts looks like or is similar to the one below:


You can remove it manually by editing the shortcut`s target line.

4. Delete any folders or files related to CosstMinn Extension by checking the following locations:





There are 2 comments left Go To Comment

  1. Anon /

    I had this on my Google Chrome extension list. I was able to disable it, but could not delete it. It would appear again next time I started Chrome. To permanently remove it, click developer mode, find the loaded from path and delete the folder that extension is loaded from. Mine looked this:
    C:\Users\Administrator\AppData\Local\Google\Chrome\User Data\Default\Extensions

    and the folder was some random letters that started in mpkonmph…

    Inside that folder were some .js files and an html file.

    1. Troy Smith / Post Author

      Hey there,
      I would advise you to do the following:
      1. Find out in developer mode the ID (the string of the random letters)
      2. Search through out the registry for it and delete it (keys and values everything)
      it should be in the
      3. Check in chrome’s policy (type in the URL chrome://policy/)
      click on the “Show Value” there you should see the folder where the actual file resides
      4. Use Windows Explorer and remove the folder
      5. Open the c:\windows\system32\GroupPolicy folder
      there should be 2 sub-folders Machine and User – in each of the folder there is a .POL file – delete it – make sure everything else from the extension is gone (run SpyHunter again) and restart your computer.
      Your CosstMinn extension should be gone now!



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