Make installed games from previous operating system work on the new

odinnholm

Reputable
Jun 19, 2014
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4,510
Hi every one.

I have just upgraded from windows 7 Ultimate to Windows 8.1 Pro.

I had about 19 very heavy games installed. I installed all of my games on a secondary harddrive so in case that my windows would break down then I wouldn't have to reinstall them. But now, I have installed the new windows 8.1 pro, I have plugged in the harddrive where I have all of my games installed, but when I try to run any of the games it comes up with some specific files are missing now. Look I know that its because when games are being installed they also are being installed partly in windows and are being registrated in the registry. Now my question is, is there a program that can fix that problem or some other way or do I have to go all the bitter way and re-install all of my already installed games?