CostMin Virus

What is CostMin?

CostMin is a potentially unwanted application, which installs on Internet browsers (Internet Explorer, Google Chrome, and Mozilla Firefox) when users download or install free software.

Developers of this adware use a deceptive software marketing method called 'bundling', and therefore, most users install the CostMin plugin inadvertently without their consent. After successful infiltration, this add-on generates intrusive coupons ads when users visit online shopping websites.

Furthermore, this plugin tracks users' Internet browsing activity by recording web pages visited and activity on those pages (impressions, clicks, and search terms). In some cases, information collated by CostMin and other services may be personally identifiable and used or shared by third parties (including information regarding pages of social media websites visited).

While this browser plugin claims to enhance Internet browsing by saving time and money while shopping online, in fact, it is a potentially unwanted program, which generates intrusive ads and diminishes browser performance.

The presence of CostMin on your system can cause serious privacy issues and lead to high-risk malware infections. For these reasons, you are advised to eliminate this adware from your Internet browser/s.

The CostMin plugin is similar to other adware, which infiltrates browsers via freeware downloads and causes unwanted ads. Examples include Media View, Rebate Informer, and Savings Bull.

Computer users should be aware that, today, most freeware download websites use deceptive 'download clients' offering installation of advertised browser plug-ins together with the chosen free program. Thus, reckless freeware downloading can result in adware infections. When downloading free software, decline installation of any advertised browser plug-ins.

When installing downloaded programs, choose the 'Advanced' or 'Custom' installation options, rather than 'Quick' or 'Typical' - this will reveal any intended installations of bundled browser plugins, and you will be able to decline them.

Computer users who observe CostMin ads and deals when surfing the Internet should use this removal guide to eliminate potentially unwanted applications from their Internet browser/s.

Deceptive free software installers used in CostMin adware distribution:

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Quick menu:

• What is CostMin?
• STEP 1. Uninstall CostMin application using Control Panel.
• STEP 2. Remove CostMin add-on from Internet Explorer.
• STEP 3. Remove CostMin plugin from Google Chrome.
• STEP 4. Remove CostMin extension from Mozilla Firefox.
• STEP 5. Remove CostMin extension from Safari.
• STEP 6. Remove rogue plug-ins from Microsoft Edge.

CostMin virus removal:

Windows 11 users:

Right-click on the Start icon, select Apps and Features. In the opened window search for the application you want to uninstall, after locating it, click on the three vertical dots and select Uninstall.

Windows 10 users:

Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.

Windows 7 users:

Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.

macOS (OSX) users:

Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.

In the uninstall programs window, look for "CostMin" and "CouponSupport", select these entries and click "Uninstall" or "Remove".

After uninstalling the potentially unwanted programs (which cause Costmin ads), scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.

Remove CostMin from Internet browsers:

Video showing how to remove potentially unwanted browser add-ons:

Remove malicious add-ons from Internet Explorer:

Click on the "gear" icon (at the top right corner of Internet Explorer) select "Manage Add-ons". Look for "CostMin", select this entry and click "Remove".

Optional method:

If you continue to have problems with removal of the costmin ads and deals, reset your Internet Explorer settings to default.

Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.

Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.

Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.

In the opened window, select the Advanced tab.

Click the Reset button.

Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.

Remove malicious extensions from Google Chrome:

Click the Chrome menu icon (at the top right corner of Google Chrome) select "Tools" and click on "Extensions". Locate: "CostMin", select this entry and click the trash can icon.

Optional method:

If you continue to have problems with removal of the costmin ads and deals, reset your Google Chrome browser settings. Click the Chrome menu icon  (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.

After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.

In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.

Remove malicious plugins from Mozilla Firefox:

Click on the Firefox menu (at the top right corner of the main window) select "Add-ons". Click on "Extensions", in the opened window remove "CostMin".

Optional method:

Computer users who have problems with costmin ads and deals removal can reset their Mozilla Firefox settings.

Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, in the opened menu, click Help.

Select Troubleshooting Information.

In the opened window, click the Refresh Firefox button.

In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.

Remove malicious extensions from Safari:

Make sure your Safari browser is active, click Safari menu, and select Preferences....

In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.

Optional method:

Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...

In the opened window select all history and click the Clear History button.

Remove malicious extensions from Microsoft Edge:

Click the Edge menu icon  (at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.

Optional method:

If you continue to have problems with removal of the costmin ads and deals, reset your Microsoft Edge browser settings. Click the Edge menu icon  (at the top right corner of Microsoft Edge) and select Settings.

In the opened settings menu select Reset settings.

Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.

• If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.

Summary:

Commonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.

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