[HangThemHigh]

You are probably correct, but he said he had tried several methods to recover his data. That often only makes matters worse. And he needed the bigger hard drive in any case.

[vigilante2]

I suppose it's possible that if somebody installed the contents of the game onto the D: drive instead of a folder of it's own, the D: drive then becomes the folder for the game..The uninstaller will delete everything in the game folder and that would explain why everything else on the D: drive was missing

Firefox will update regularly on it's own..older versions of windows won't know what to do with the newer programs so the updates could cause problems as well..

No doubt there could be malware on there..The anti virus software doesn't detect all malware or new viruses if it doesn't know about them yet