I don't promise anything, but maybe a list of the task running could help to detect what is running on your pc and should not. If we get what it is, you could search the registry to avoid that it gets loaded at boot. Just make a grab of windows taskmanager, or, if you have a resource kit installed, type this at the command prompt:

PULIST

and post the output here.

Also, I am attaching a simple .cpl that will tell you what starts at your pc boot. Just install it and go to the control panel. You will have a new icon called "startup". Start it and delete the items you don't want to be loaded on boot.