Have you thought to mabey do some of the following?
1. Identify the problem & fix the problem.
2. Take steps to not allow said problem to happen again.
If you are wondering what I am talking about.
Computer A. is infected with an unknown virus, it is running Windows XP SP3 (I hope SP3), with obviously no anti virus software and no firewall protection.
Diagnose.
Shutdown computer A. immediately. Go to
http://www.avira.com/en/download/product/avira-rescue-system and download the rescue cd from a known clean computer.
Goto
http://unetbootin.sourceforge.net/ and download the windows binary.
Place a flash drive at least 1 GB in size in known clean computer and format it as a fat32, quick format will do.
Run unetbootin and click diskimage, and the button with the "..." on it. Locate the avira rescue cd iso and open it.
Make sure the drive is set to the flash drive and click ok.
Once complete, eject flash drive.
Put said flash drive in infect computer and boot from it, scan computer and remove viruses.
To be continued.
I am a sysadmin by the way, I do this shit for a living.