Using fully registered Avast 4.8.1335. Recent began receiving “An invalid argument was encountered” messages from ashEnhcd.exe when initiating a scan of local disk. :
Clearing the message causes another pop-up with the same. Repeats in a short string sometimes, or seemingly indefinitely at others.
A restart of the WinXP Pro system where it is running does not clear the message. We have the latest VDB and program updates.
try to repair your installation of avast! (via add/remove program in the control panel - then choose repair)
if that doesn’t help try to uninstall and reinstall avast!
(don’t forget to restart your PC)