Throwing in a pitch for MalwareBytes. Its a pretty good progam and has kept my PCs/laptops clean for years. If the virus blocks the application from running, usually starting windows in safe mode will allow you to run it. Also you can then go into msconfig and check out what applications and services are running at startup.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth