Adware:W32/Bettersurf, Adware:js/bettersurf


Adware:W32/Bettersurf is a browser add-on or extension that displays advertising content during a browsing session and/or on the desktop.

Disabling/removing a browser component

To disable or remove an unwanted browser component, follow the instructions for the relevant web browser:

After disabling or removing the component, perform a full system scan.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

For more Support


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User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

Once installed, the adware displays advertising content in the web browser during a browsing session and/or on the desktop. The adware reportedly also causes system crashes.

The Bettersurf extension may be distributed bundled together with another program.


As of 15 November 2013, the Bettersurf extension has been blocked by Firefox for causing "serious security, stability, or performance issues".