Avast GrimeFighter: Scanning and cleaning your PC with Avast GrimeFighter

How to run an Avast GrimeFighter scan


Note: The Avast 2015, R3 update includes Cleanup, which replaces GrimeFighter in future releases. Read more..


  • Windows 8.1 except RT and Starter Edition (32 or 64-bit); Windows 8 except RT and Starter Edition (32 or 64-bit); Windows 7 SP1 or higher, any Edition (32 or 64-bit); Windows Vista SP2 or higher, except Starter Edition (32 or 64-bit); Windows XP SP2 or higher, any Edition.
  • Permanent Internet connection (computer connection via LAN cable is strongly recommended).
  • 512 MB RAM or above.
  • 256 MB minimum hard disk free space.
  • Avast GrimeFighter does not run on any Apple Mac OS, or any other which isn't specified as supported.

Before you start your Avast GrimeFighter scan please ensure that you are logged in with administrator permissions, and all other programs on your computer are closed.

The following instructions assume that Avast Antivirus 2015 is installed on your computer. For detailed instructions refer to the articles below:
  1. Open your Avast Antivirus user interface and go to Scan → Scan for performance issues.
  2. Run the file grimefighter.exe which you have previously downloaded to your PC.
  3. GrimeFighter runs a preliminary scan. Select Optimize my PC.

    If you are using GrimeFighter for the first time on the computer, you must purchase a license or sign in to your Avast Account to activate an existing license.
  4. Select Reboot and run now. When the computer restarts click Begin GrimeFighter to begin scanning.
  5. Click Clean My System to run the cleanup.
  6. After GrimeFighter has finished cleaning your system, your final report appears. Click Return to Windows to exit GrimeFighter and restart your system.
  7. Your system returns to Windows in an optimized state.

It is recommended to have a look around just after the scan, to be sure that everything is working properly and none of the changes interfere with your normal activities on the PC.

In case there is any problem you can undo the changes within 7 days of the clean. For details please read the following article:

Please follow the detailed steps below to run an Avast GrimeFighter scan on your computer.

The following instructions assume that Avast Antivirus 2015 is installed on your computer. For detailed instructions refer to the articles below:
  1. Open your Avast Antivirus user interface and go to Scan → Scan for performance issues.
  2. Run the file grimefighter.exe which you have previously downloaded to your PC.
  3. When the preliminary analysis is complete, click Optimize my PC. If you are using GrimeFighter for the first time on the computer, you must purchase a license or sign in to your Avast Account to activate an existing license.
  4. When the preliminary analysis is complete, click Optimize my PC. If you are using GrimeFighter for the first time on the computer, you must purchase a license or sign in to your Avast Account to activate an existing license.
  5. Select Reboot and run now. Or, you can schedule the scan for later. The computer restarts in GrimeFighter mode. Click Begin GrimeFighter to begin scanning.
    Avast GrimeFighter may take anywhere from 30 minutes up to four hours to scan your computer. During the scan you can browse the Internet, but keep in mind that you won't be able to access any of your Windows files or applications.
    If you need to return to Windows during a scan, you can exit GrimeFighter by clicking the cross in the top right corner of the screen, and select Reboot.
  6. When the scan is complete, you have the option to review changes before performing the cleanup:
    • If you want to accept all recommended changes to your computer, click Clean My System.
    • Otherwise click Review and Edit Changes to view the recommended changes before performing the final system cleanup. Choose actions for each item. When you are finished reviewing click Apply Changes, ...and then select Clean My System.
  7. After GrimeFighter has finished cleaning your system, your final report appears. Click Return to Windows to exit GrimeFighter and restart your system.
  8. Your system returns to Windows in an optimized state.

It is recommended to have a look around just after the scan, to be sure that everything is working properly and none of the changes interfere with your normal activities on the PC.

In case there is any problem you can undo the changes within 7 days of the clean. For details please read the following article:

  • Avast GrimeFighter
     
  • Avast Premier 2015
  • Avast Internet Security 2015
  • Avast Pro Antivirus 2015
  • Avast Free Antivirus 2015
  • Microsoft Windows 8.1 / Pro / Enterprise
  • Microsoft Windows 8 / Pro / Enterprise
  • Microsoft Windows 7 Home Basic / Home Premium / Professional / Enterprise / Ultimate
  • Microsoft Windows Vista Home Basic / Home Premium / Business / Enterprise / Ultimate
  • Microsoft Windows XP Home / Professional / Media Center Edition

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