I recently had a new motherboard and hard drive installed in my HP Pavilion 310n. After succesfully loading the 6 disc HP XP Recovery discs, which I purchased 2 months ago from HP, I connected to the internet to register the new installation. Right away, my system slowed down alot, the Internet Explorer browser just kept 'searching' for the microsoft site, and finally the "System is shutting down....initialized by the NT Authority/System....C:\WINDOWS\SYSTEM32\ISASS.EXE...will terminate unexpectedly..code# 107374189" window popped-up.

This is the 3rd time this has happened to me while installing a new XP operating system on 3 different PC's! 2 on Dells (with Dell XP installations) and now on my HP (with an HP XP installation).

2 things:

1. Why is this happening? Are the drivers corrupted?

2. How can I fix the problem?

I loaded Norton Professional, updated it (in safe mode, the only way the internet works), and ran it deleted a couple of viruses. I also downloaded and ran VGS, which also found some viruses. backdoor.bot was one of them.

HELP!!!

Luis