I am currently in the process of fixing a friends Laptop that is badly infected with who knows what.
Unfortunately, He did not have any anti virus installed, and it now appears impossible to install any.
I can: Boot into normal xp and safe mode get onto the internet if I plug the laptop directly into the rotuer open cmd, my computer, control panel (with limitiations)
I cannot: Install most anti virus software. I get some form of error with all of them. See the start bar (It's hidden out of view) Use the 'search' function open many programs including IE (got MF though) many other random things
I have tried: running combofix, it says a system file is infected (regedit) and then installs something from the windows website to install it, however that fails to fix the problem. running chkdsk running spybot s and d
I am fairly sure I am blocked from changing any services or anything, the virus has stopped me changing startup options, and often i can't close windows.