There are lots of Bad virus alert messages circulating Check against these before doing anything.
www.hoax-slayer.com/
The real viruses often never announce themselves you see something then its too late (And the reason it landed was your defences were down!! )
Best insurance: Check your Defences are working Firewall Working?
Update your A/V program,Spywareblaster, Avast!.AdAware,run Windows Update,