Avast 2015: Scanning with Avast GrimeFighter

Scanning with Avast GrimeFighter


If you use Avast GrimeFighter as a standalone application, please follow these instructions:

The following system requirements are recommended in order to run Avast GrimeFighter:

  • Microsoft Windows 7 (any Edition, 32-bit or 64-bit), Microsoft Windows Vista Service Pack 2 or higher (any Edition excl. Starter Edition, 32-bit or 64-bit) or Microsoft Windows XP Service Pack 3 (any Edition, 32-bit or 64-bit).

  • Internet connection.

  • 512 MB RAM or above.

  • 256 MB minimum hard disk free space.

Please be advised, that Avast GrimeFighter:

  • Does not run on any Apple Mac OS, or any other system which isn't specified as supported.

  • Is not supported by all graphics cards.

  • Does not support RAID. If a RAID controller is detected Avast GrimeFighter does not run, to avoid data loss.

  • Requires a constant Internet connection. In case of wireless network issues, try using an Ethernet cable for a more stable connection.

  • Support for Windows 8 / 8.1 is limited.

How to run an Avast GrimeFighter scan


If you use Avast GrimeFighter as a standalone application, please follow these instructions:

Before you start your Avast GrimeFighter scan please ensure that you are logged in with administrator permissions, all other programs on your computer are closed. The following instructions assume that Avast Antivirus 2015 is installed on your computer. For step-by-step instructions on how to download, install and open your version Avast Antivirus 2015 please read the following article:

Avast 2015: Installing Avast Premier | Installing Avast Internet Security | Installing Avast Pro Antivirus | Installing Avast Free Antivirus

When you are ready, you can find instructions for using Avast GrimeFighter below:

Accessing Avast GrimeFighter


If you use Avast GrimeFighter as a standalone application, please follow these instructions:

To access GrimeFighter within Avast Antivirus:

  1. Right-click on the Avast Antivirus 2015 orange ball icon in the system tray and select 'Open Avast user interface' from the menu,
    Figure I

    ...or double-click the desktop icon of installed Avast Antivirus 2015 software to open the Avast user interface.
    Figure II

  2. From the main menu, select ' Scan' → 'Scan for performance issues'.
    Figure III

    If you do not see the option Scan for performance issues, then Avast Antivirus 2015 has determined that your system is incompatible with running Avast GrimeFighter for some reason. To find out why please refer to the following article:

  3. After selecting the GrimeFighter option, you will receive a summarized report of issues that Avast GrimeFighter has detected. You must activate a purchased license for Avast GrimeFighter before running your first scan.

  4. If your license is already activated, you can rescan your computer as many times as needed during your subscription period. Just click Optimize my PC to continue to scanning.
Purchasing Avast GrimeFighter on first time scan
  1. If you are using Avast GrimeFighter for the first time on your computer, and you don't have a license yet, you may purchase one by clicking Optimize my PC.
    Figure IV

  2. Choose a subscription for Avast GrimeFighter from the list and click Activate. In the next screen you can review or change the selected subscription period, and Auto-Renewal service.

  3. Fill in your customer information and payment details in the following screens.

  4. Upon the confirmation of payment information you will be taken to the Activation page.
    Figure V

    Click Optimize My PC to continue to scanning.

Activating Avast GrimeFighter with an existing license
  1. If you are running an Avast GrimeFighter scan for the first time on your computer and you already have a valid license, you must verify it. First click Optimize my PC.
    Figure VI

  2. Then select Do you already have a subscription? below the list of available subscription options.
    Figure VII

  3. Sign in to your Avast Account using the credentials you provided during your Avast GrimeFighter purchase. If you don't know your password, reset it by clicking Forgot your password and enter the e-mail you provided during your Avast GrimeFighter.

  4. Once you've successfully logged in, select the license for Avast GrimeFighter you want to use.
    Figure VIII

    Click Optimize my PC to continue to scanning.

Running an Avast GrimeFighter scan
  1. When you select to optimize your PC, Avast GrimeFighter downloads all the necessary files to sedate and scan your computer.
    Figure IX

  2. When the files are downloaded, you must Restart your computer to start the scan. Select Reboot and run now, or you can schedule it for later.

  3. Once your computer has been started in Avast GrimeFighter mode, click Begin GrimeFighter to start your scan.
    Figure X

Avast GrimeFighter may take anywhere from 30 minutes up to four hours to run its thorough scan. Meanwhile you can browse the Internet, but you won't be able to access any of your Windows files or applications. Therefore, you might want to put the minions to work before you go to sleep. If for whatever reason you need to return to Windows during a scan, you can exit Avast GrimeFighter by clicking the large cross symbol in the top right corner of the screen.

Settings options in Avast GrimeFighter

Once your computer has been started in Avast GrimeFighter mode, you can find your Settings options by clicking the gear icon in the top, right-hand corner of your screen.

Figure XI

The following settings are available:

  • Language - on this tab you can set the Avast GrimeFighter user interface to the language of your choice.

  • Keyboard - here you can set your keyboard layout in Avast GrimeFighter to the language of your choice.

  • Options - here you can choose whether Avast GrimeFighter should automatically reboot back into Windows or shutdown your computer once your scan is complete.

Figure XII

To exit from the settings window, click on the cross symbol in the top right corner of the window.

Reviewing Avast GrimeFighter scan results before cleaning the system

Upon the completion of an Avast GrimeFighter scan, you can choose to (a) accept all recommended changes and clean the system automatically, or (b) review and edit the recommended changes before performing the cleanup:

  1. If you want to accept all recommended changes to your computer, click Clean My System.
    Figure XIII

  2. Otherwise, to view the recommended changes before performing the final system cleanup, click Review and Edit Changes,
    Figure XIV

    ...and set which action you want to apply for each item, one by one. If you are not sure about your changes, you can always get the original recommendations back by clicking 'Reset to Default Changes'. When you're finished reviewing, click Apply Changes and then Clean My System.
    Figure XV

Viewing Avast GrimeFighter activity summary

Upon the completion of an Avast GrimeFighter system cleanup you will be directed to your final report, which not only signifies the completion of a scan, but also provides an easy to read summary of what was done to improve your computer’s security, performance and privacy.

Figure XVI

The "Karma" value for each category is a rough numerical representation of how much grime the minions found and removed from your system. When you have familiarized yourself with the changes, you can click Return to Windows to restart your computer and get back into Windows.

Figure XVII

If you find you are unsatisfied with these changes, you have the option of undoing your last scan. To find out more about this process please visit:


Avast GrimeFighter 2015

Avast Premier 2015
Avast Internet Security 2015
Avast Pro Antivirus 2015
Avast Free Antivirus 2015

Operating systems:

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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