yeah, like Jumby said, get some firewall software. You also might check this...
Get the name of the file that is infected or being "quarantined" (fancy word for isolated) and see if it's on your Windows OS installation CD somewhere. If so, you MIGHT be able to copy that file off the CD to your hard drive and get it to work. It's worth a try, it can't hurt anything.
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Computer Error Haiku-
"Warning: Universe Corrupt. Reboot?(Y/N)"
Computer Error Haiku-
"Warning: Universe Corrupt. Reboot?(Y/N)"