if I understand well the pc doesn't reboot immediately, but first display an warn screen, is that true?
To remove the virus you should use some online virus scan service, like panda antivirus http://www.pandasecurity.com/homeusers/solutions/activescan/
(use it with internet explorer, it doesn't seem work with firefox),but, unfortunately, before to do that you should prevent the virus to reboot the system.
To do that, well, you should understand which kind of virus you have, for example if your system display a warn screen before reboot, you could try to do a google search typing what is written on the screen...
Posted: 2008-12-20 13:07:48