How are you trying to remove the worm? By running a virus scan on it?

If so, that wont work as the worm is to new for the virus detection to know how to detect.

Delete the registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\Windows Auto Update

Reboot. OPen up my computer, c: drive, winnt (or windows), system32, look for msblast.exe. Right click on it, uncheck read only, and then press ok. then delete. Currently thats how you get rid of it.

Hope this helps.