Before I start repeating myself, one more comment: This virus/worm doesn't infect just an e-mail program, it infects Windows. Bill, and everyone else who's got it, you're gonna keep sending it until you get it off your computer.

One more time with feeling - and this is IMPORTANT!!!

You have to repair the damage the worm has caused.
This is what the file I linked to at F-Secure does. That is ALL it does - it does NOT remove the worm.

You have to get rid of the worm.
It's best to use a good and current anti-virus program, but the websites (especially the Symantec one) have information on what files the worm creates.

The important things:

1) If you repair the damage the worm has done without removing the worm itself, it appears you will re-infect yourself every time you run a program. (I'm guessing on that last bit.)

2) If you remove the worm without repairing the damage, either before or after, your computer may not work properly.

You have to do both.

HELP is here:
F-Secure, and
Symantec (posted by kat).