Simple virus problem...
Download HijackThis and scan your computer with it.. Post the logfile here. Don't try to fix it yourself, if you don't know much...
These commands might help, but this is not a permanent solution.
Open up the command prompt and type in:
Code:
attrib -h -s -r -a c:\autorun.inf
del c:\autorun.inf
Repeat the same for all your HDDs. Then immediately reboot, without opening any of the drives.
This shud solve your problem temporarily, if no worm is running.
Anyways, you will have to provide the HijackThis log to help us remove the worm completely.