Around 3-4 days ago, there was a new upgrade available for Avast.
Following this, we had again, like a few weeks ago, a permission problem on the folder where Avast is installed. This was on the same computer; the conditions were:
-win2K non-english (French in my case)
-Avast not installed in default directory
Changing the permission did solve the issue.
When we reported it few weeks ago, did the issue actually got solved or not?
It would be best to (under Admin account) uninstall the old version, even run aswClear (http://www.avast.com/eng/avast-uninstall-utility.html) and then install the latest version again. This way, you can confirm/deny that the problem was indeed fixed in the latest version (that is, make sure that the new problem is not somehow caused by the previous version’s one).