Oh, yeah, and when that "shutdown warning" box pops up, immediately go st Start>Run, type, without the quotes, "shutdown -a" (observe the space between "shutdown" and "-a"), then click "OK" or hit ENTER - that oughtta abort the shutdown call the worm has initiated. A good first-thing-to-try would be to download and run
STINGER. I'd also recommend a thorough scan with your own antivirus, and mebbe a runthrough of one or more of the online virus scanners
and ferchrissakes ... keep your firewall up and running!