How to remove Avast products?



Kaspersky Small Office Security 2.0 (PC)


How to remove Avast products?

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2012 Jan 19 ID: 7158

Applies to Kaspersky Small Office Security 2 for Personal Computer

Sometimes after removal of Avast anti-virus software with the standard means and the computer restart some records may still remain in the system registry and prevent Kaspersky Small Office Security 2 for Personal Computer from installation.

Before the files are copied onto a hard disk the Setup Wizard scans the disk for software incompatible with Kaspersky Small Office Security 2 for Personal Computer. Records in the system registry are recognized by the Setup Wizard as fully installed Avast software, even though the product was removed and is no longer installed on the PC. As a result the Setup Wizard asks to delete the detected incompatible software manually and terminates the installation process. 

How to remove Avast software using standard Microsoft Windows tools?

  • in the bottom left corner click the Start button
  • perform the following actions:
    • for Windows XP:
      • select the Control Panel item

      • in the Control Panel window click Add or Remove programs

    • for Windows Vista and Windows 7:
      • select the Control Panel item

      • in the Control Panel window click Programs

      • in the Programs window select Programs and components

  • in the list of programs select the Avast anti-virus
  • perform the following actions:
    • for Windows XP:
      • click the button Change/Remove
    • for Windows Vista and Windows 7:
      • double-click the application name
  • in the avast! Antivirus setup click the Uninstall button
  • click the Next button
  • in the avast! Warning window click the Yes button to confirm that you want to uninstall the software
  • wait until the process is completed

  • in order to fully remove the Avast software, you will be asked to restart your computer
  • in the avast! Antivirus setup window, you will see the following message: "The product was successfully uninstalled. Some files may stay in their current locations until the next reboot, though". In order to restart your computer immediately after the uninstallation, select the Restart option
  • click the Finish button.

Try to install Kaspersky Small Office Security 2 for Personal Computer once again.

If Avast anti-virus has been successfully removed from your computer you do not need to perform the following steps. If an error message informs that Avast anti-virus removal was unsuccessful you will have to delete Avast anti-virus manually.

The utility aswclear5.exe to remove Avast software

To remove Avast software, use a special Avast removal tool aswclear5.exe (ASWCLEAR5 (С) ALWIL Software):

  • download the tool aswclear5.exe
  • reboot in Safe Mode
  • run the file aswclear5.exe
  • in the Select product to uninstall field, select the required product you want to uninstall
  • if you installed Avast in a different folder than the default, then select the required folder in the field Enter path to folder where selected product is installed

InformationBe careful, the content of any folder you choose will be deleted.


  • click the Uninstall button. Wait till the process is completed.
  • after the Avast software is uninstalled, the Question window appears. It will contain the following information: "Remaining items will be removed after restart. Do you wish to restart now?". Click the Yes button to restart your computer.

Try to install Kaspersky Small Office Security 2 for Personal Computer once again.

If all remains of your previous anti-virus software were removed, or you have not had any anti-virus software installed on your computer, but you cannot install a Kaspersky Lab product, then create a request to Kaspersky Lab Technical Support via the My Kaspersky Account service. Attach to your request a report created using Getsysteminfo.

In the request, do not forget to describe the problem and actions which are required to be performed to reproduce the problem in all details.

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