Friend has just dropped a PC in which he believes is infected,my problem is that I cannot get to the desktop. I get a POST but do not see the desktop, I have ruled out a graphics card problem as I have tried an alternative HDD with xp on and although it does not boot all the way due to driver issues obviously but I can see the windows logo and the moving blue bars. I need to get in to run a scan or scans. Suggestions wanted. Cheers.
After you press the power button to switch the computer on, start tapping the F8 key. At the Advanced Boot Options screen select Safe Mode and see whether it will boot. If so, then run System Restore and roll back to a date/time before the problem started.
Assuming you can then boot normally, run a full AV and malware scan.