Where do the files:__7B296FB0-376B-497e-B012-9C450E1B7327-2P-0.C7483456-A289-439d-8115-601632D005A0__7B296FB0-376B-497e-B012-9C450E1B7327-2P-1.C7483456-A289-439d-8115-601632D005A0__in system32 folder come from:

I recently had a Microsoft update plus I installed a commercial program and I also checked for a possible trojan where it was mentioned that it would put a strange file in the System32 folder. I noted the following files were in the system32 folder (i.e. 7B296FB0-376B-497e-B012-9C450E1B7327-2P-0.C7483456-A289-439d-8115-601632D005A0
7B296FB0-376B-497e-B012-9C450E1B7327-2P-1.C7483456-A289-439d-8115-601632D005A0) but nothing seems to have been put into the registry.
The files cannot be moved/copied or deleted as windows states they are being used by another program. I could delete them if I booted into Safe CMD mode but they just came back again.

Also, I then got a message that my copy of "windows was not genuine". (This aspect seems to have been fixed with help from Darin.)

So what are these files?? Are they part of a virus/trojan etc or harmless? (I've tried 3 anti-virus programs and none seems to be able to recognise it.)

For more information See post http://social.microsoft.com/Forums/en-US/genuinevista/thread/0a982adc-a18d-436b-aa13-dc8965c83d3b?prof=required&ppud=4
for more information.

Can anyone help on this?
Many thanks
Bob