so, I recently installed windows 8.1 via bootable usb drive with RUFUS bootable usb software.
now I have 2 OS which are Win 7 and win 8.1 . the win 7 located in disk C while the win 8.1 located in the disk D. nothing gone wrong witch windows 7. I can run all games that installed there. But In win 8.1 I cant play any games and there's always missing dll pop ups. should I reinstall the game with win 8 configuration? or is there another way for thaT?
Yes. The new OS knows nothing about the location of all the required files. dll's, etc.