A very good FREE anti-virus product is Microsoft Security Essentials:
http://windows.microsoft.com/en-us/windows/security-essentials-download
One option they offer is to download a boot thumb-drive or boot CD image
with the anti-virus program built in.
Booting from something other than the system drive is particularly
useful to remove "Root Kits".
When your PC is set to boot from removable / external drive ( USB Thumb
Drive or CD/DVD ), and you insert the USB Thumb Drive or CD/DVD and
reboot, the screen will be blank for a few minutes, the a monochrome
Windows logo will be displayed, after a while you will get a report of
what malicious software, if any, was found and what was done to remove
it.
A bootable Microsoft Security Essentials USB drive is my #1 IT support
tool!
73
Lloyd - N9LB MCSE
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Topband Reflector
