I think I have a virus, what should I do?

The first thing to do is to disconnect your computer from the network/internet. This does two things:
  1. Prevents your computer from infecting others and...
  2. Limits what can be done to your machine by the virus' author/controller.

Next, you should contact your department's technical support (mcb-support@list.arizona.edu) personel for help/advice on disinfecting your computer.