Are you sure the same file is not e.g. in your Windows\System folder as well?
Try Control Panel / Add/Remove Programs / avast! Antivirus / Change / Repair.
Yes, most certainly there is only one file with this name on the system.
However, your suggested repair procedure did fix the problem
Is this dll supposed to be in Windows/system? there is still only one instance of this file after the repair, (HDD searched and all usual dll-locations checked manually) and that is in the avast program directory
Well anyway thanks for the repair tip, I didn’t even know there was such a feature.
That’s correct, there should be only one instance of the file, placed in avast! installation folder (if there are more of them, it may cause problems).