My virus checker picked up a trojan in the two copies of cmd.exe and they have been deleted. I now get this pop-up:
Windows File Protection Files that are required for Windows to run properly have been replaced by unrecognized versions. To maintian system stability, Windows must restore the original versions of these files. Insert your Windows XP Professional Service Pack 2 CD now.
I probably lost this CD 10 years ago. I've found a bunch of copies of cmd.exe online and tried them, but they all vary widely in size and the pop-up comes straight back after dismissing it even after these replacements have been made. Can I somehow find out which version it's looking for and is there any way to obtain it once I do?