Also, if you don’t have a second clean HD preloaded with Windows, you can alway use a boot disk, like BART PE. Bart can be configured to run Spybot, McAfee Stinger, or Ad Aware without having to boot to the OS of your affected HD.
Stinger has NEVER been a fully-featured virus scan. It just scans for certain infections, depending on the version. And the last version I saw on their site was WAY out of date. And the config files on the BartPE config are also WAY OUT OF DATE, and I must have spent about 6 hours trying to get a number of different AV programs to work, none of which would.
Mark