Yes... It's a virus. Disconnect your computer from the Internet. Seriously. Now. Find a Norton Antivirus CD wand some up-to-date defs and boot from it. The CD should be bootable. Then run a virus scan. If you're very lucky, safe mode might work for you.

Browsing the Internet without antivirus software is like...
Having sex with a $2 how without a condom.
(sorry... can't remember who wrote that)