Hello.
I had a fresh installation of Windows XP Prof. SP2 and I installed Avast 4.8 free edition on It.
It operated fine for two days but when i connected the PC to the Wi-Fi access point after some minutes avast has become to have strange behavior. First of all avast services have been suddenly disabled (or somehow removed). As it was the fresh XP installation there was the only user account activated but when i rebooted my PC there was a login welcome screen where i had to choose the current login (login process was automated before). So i tried to uninstall avast and reinstall it to force it to operate. The unistallation went OK but it cannot be installed again. There is some error in the log about the failure of creating it's services registry keys. Since this time avast cannot be even installed and the PC has strange behavior. Can someone give me some advice or maybe someone already have solved the similar problem?