The problem is in the Anti-Virus ap you are using if the problem stops when it becomes disabled.
Dump the av ap you are using and get one of these freeware av aps.Antivirus programs - freeware
(you can only use one resident anti-virus program on your computer. More than one will conflict)
Avast Anti-virus freewarehttp://www.komando.com/bestshareware.asp
I personally use AVG and recommend it highly.
One other suggestion:
Do not delete the prefetch files. If you do it will slow down your computer.
Cleaning the Prefetch folder as beneficial is a Myth and actually degrades performance. Windows by default cleans this folder at 128 entries.
It is a directory, not files but only a directory of file locations with directions for Windows where to find these files on your hard drive so when it needs them Windows does not have to search the hard drive for them.
Anyone who claims this should be cleaned for ANY reason does not understand how Windows Prefetching works.)
Edited by Enthusiast, 26 September 2006 - 03:40 PM.