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CostMin Virus

Also Known As: CostMin Ads and Deals
Type: Adware
Damage level: Moderate

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.

Costmin virus

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 ViewRebate 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:

costmin adware installer sample 3 costmin adware installer sample 2 costmin adware installer

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Quick menu:

CostMin virus removal:

Windows 11 users:

Accessing Apps and Features in Windows 11

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:

Accessing Programs and Features (uninstall) in Windows 8

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:

Accessing Programs and Features (uninstall) in Windows 7

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:

Uninstall app in OSX (Mac)

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.

Costmin uninstall via Control Panel

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:

Internet Explorer logoRemove malicious add-ons from Internet Explorer:

Removing costmin from Internet Explorer extensions step 1

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

Removing costmin from Internet Explorer extensions step 2

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.

Resetting Internet Explorer settings to default on Windows XP

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.

Resetting Internet Explorer settings to default on Windows 7

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

Reseting Internet Explorer settings to default in Windows 8 - accessing

In the opened window, select the Advanced tab.

Resetting Internet Explorer settings to default on Windows 8 - Internet options advanced tab

Click the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - click the Reset button in the Internet options advanced tab

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

Resetting Internet Explorer settings to default on Windows 8 - confirm settings reset to default by clicking the reset button

Google Chrome logoRemove malicious extensions from Google Chrome:

Removing costmin from Google Chrome extensions step 1

Click the Chrome menu icon Google Chrome options 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.

Removing costmin from Google Chrome extensions step 2

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 Google 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.

Google Chrome settings reset step 1

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

Google Chrome settings reset step 2

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

Google Chrome settings reset step 3

Mozilla Firefox logoRemove malicious plugins from Mozilla Firefox:

Removing costmin from Mozilla Firefox extensions step 1

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

Removing costmin from Mozilla Firefox extensions step 2

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, firefox menu icon in the opened menu, click Help.

Accessing settings (Reset Firefox to default settings step 1)

Select Troubleshooting Information.

Accessing Troubleshooting Information (Reset Firefox to default settings step 2)

In the opened window, click the Refresh Firefox button.

Clicking on Refresh Firefox button (Reset Firefox to default settings step 3)

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

Confirm your want to reset Firefox settings to default (Reset Firefox to default settings step 4)

safari browser logoRemove malicious extensions from Safari:

removing adware from safari step 1 - accessing preferences

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

removing adware from safari step 2 - removing extensions

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...

resetting safari step 1

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

resetting safari step 2

Microsoft Edge (Chromium) logoRemove malicious extensions from Microsoft Edge:

Removing adware from Microsoft Edge step 1

Click the Edge menu icon Microsoft Edge (chromium) 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.

Removing adware from Microsoft Edge step 2

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 Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge) and select Settings.

Microsoft Edge (Chromium) reset step 1

In the opened settings menu select Reset settings.

Microsoft Edge (Chromium) reset step 2

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.

Microsoft Edge (Chromium) reset step 3

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

Summary:

declining installation of adware while downloading free software sampleCommonly, 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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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

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Removal Instructions in other languages
Software uninstall instructions
Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
CostMin Ads and Deals QR code
Scan this QR code to have an easy access removal guide of CostMin Ads and Deals on your mobile device.
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