This isn't a virus. It's an application. Security Essentials warned me that Firefox wanted to make an exception on the firewall, and I allowed it. It was my fault. I have never seen a browser application ask to breach the firewall. I should have known better. It will never happen again.
Restore points are fabulous.
Sounds like you got spoofed by something pretending to be FireFox. You should get and run an anti-virus program. Microsoft Security Essentials is not nearly enough.
Often, your ISP will provide one for you to download, like McAfee or Symantec. If not, a halfway decent free one can be had here:
Restore points are, indeed, fabulous, but I didn’t think they get rid of malware. Do they?
I’ve been hit twice lately, immediately restarted in Safe Mode, and ran appropriate scans to remove the nasty stuff. So far, so good.
Thanks. Most virus software warn of this kind of event. I use Firefox, so I will be on guard.