AFter running Malwarebytes, and other malware removal tools to clean up the machine, and you're sure that all malware is gone, please click on the the link below and download the "unhide.exe" file which will frequently fix the problem registry entries that make various files, folders, and drives disappear. Once you've downloaded the file to your desktop, double click on it to run the fixer.
Clicking on the link below will immediately open a download dialogue window.
And just a note, part of of your problem may be that you need to update to Service Pack 3.. Most of the badly infected computers I fix are not updated to the most current versions of their operating system. Service Pack 3, and the security updates that are allowed to be installed only after SP3 is installed, help against such infections.. They're not perfect, but they sure lock down the machined better than the previous SP.
Hope this helps.
I had the system restore virus on my pc. I found a youtube video on eliminating this bug and began the procedure. My progress ended when I was supposed to go into my c: drive and find certain programs and delete them. When I tried to open the c: drive there was nothing there. The drive properties show that I have filled about 75% of the drive but nothing was listed. When I click on start-all programs most items that pop up show as empty. Also when looking at my desktop the display seems dimly lit. I am running win xp service pack 2.