I am using Avast 4 Professional but these days could not launch avast and can only do quick scan. Is there any one with such problem?
Why can’t you launch avast ?
What is it that you are trying to do exactly ?
What errors are displayed ?
Which is your Windows? 98, Me, XP, Vista?
Do you use any other antivirus in your computer?
Can you try to repair your installation?
Go to Control Panel > Add/Remove programs > avast! antivirus > Remove. Then choose Repair function in the popup window (Repair).
If this does not help, can you uninstall / boot / install / boot again?
Thanks, I am now trying to uninstall and reinstall again. Hope that must work.
Please, keep posting until we get it solved 