Vlk
9
Just to make it clearer for me, can you please confirm that it was like this:
- you were using a previous version of Windows (e.g. XP)
- you had avast already installed in that version of Windows
- then you upgraded your OS to Vista (not a full reinstall, just upgrade)
Is that correct?
This upgrade path is indeed unsupported and you must reinstall avast in this case (in Vista). This is because avast in Vista uses different device drivers to get its job done.
Thanks
Vlk