@OP: coming from a guy who's spent the last 6 years of his life removing infections from computers I can say this with utter confidence. The people posting that "it's probably ____ worm, run this tool from a hacking forum and you'll be fine" are complete and total nards. Disconnect from the internet, don't run those programs, you can have any of thousands of back doors that I've seen over the years.
Fire up an ubuntu disk, disconnect your MODEM from the wall so it is totally off, delete the infected FILES manually in Ubuntu. Boot a windows install disk, do a repair on your computer (sfc /scannow) to replace any files you just deleted that are system files, log in to your router, remove all port forwarding, change the name of your router, change your wireless password, change the password to log into your router. Boot safe mode, run MBAM scan, run TDSSKiller, run MSE, remove all infections they found. Get a real AV software (Kaspersky Internet Security, NOD32), make sure Window's firewall is installed and active if you're too cheap to get a real AV program. Shut down that computer.
Go to the next computer, power it on, do the exact same steps to repair it, then shut it down.
Go to EVERY other computer on your network, repeat these same steps.
Plug your modem back in, it get's a new IP address, problem solved.
YOU WON'T BEAT THIS WHILE CONNECTED TO THE INTERNET.