Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Why can't I uninstall Avast Free Antivirus? It always says "there is an error" that occurred and doesn't uninstall the product.

share|improve this question
up vote 2 down vote accepted

Did you exit the application first?

Try with Revo Uninstaller.

share|improve this answer
doesn't work, but I'll try disabling all the services of avast in safe mode. Ms config doesn't allow me to change the startup value of avast – Ieyasu Sawada Mar 13 '10 at 0:51
Maybe you can change the startup state through Avast's options. Or use Autoruns – outsideblasts Mar 13 '10 at 1:04
Better than Revo - and has a portable and 64-bit support too. Awesome stuff!!!! – Leptonator Jan 21 '14 at 8:00

In the past when I've had trouble uninstalling programs, sometimes the solution was to repair/reinstall them first.

share|improve this answer

Try AppRemover:

The portable software program that is compatible with Microsoft operating systems from Windows 2000 to the latest Windows 7 Beta (including 64-bit editions of XP and Vista) can be run right after download. It will scan the computer system for security software programs and display all that have been found in a list. It is possible to remove all or only selected ones from the system.

share|improve this answer

Avast has its own dedicated uninstall utility called aswClear for removing Avast software from your Windows PC computer.

Instructions For Avast removal using this utility can be found here.

share|improve this answer

The reason behind the problem you are facing is that there is an instance of Avast is running in background. So inorder to be able to remove the antivirus software please exit from it (just closing the window may not help).

If this dosen't work try using


share|improve this answer

protected by slhck Oct 9 '11 at 10:14

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged or ask your own question.