[strike]I'm assuming he's getting blue screens, unless the game is dumping an error stack somewhere in the installation folder.
Was your GPU overclocked in the first place? Revert to stock clocks, if so. Same goes for CPU.[/strike]
Okay, I'm frustrated by this issue enough (even if I don't have it) to actually start blaming windows, whose 8.1 version seemingly being the only common element. Had a bit of free time on my hands and Googled around.
Just EVERYONE with this issue on any multimedia-related application either stated that they owned w8.1 as their OS, that they were on a laptop (and thus had Nvidia Optimus or AMD Enduro), or both.
Funnily enough, there are no fixes known, but rather only workarounds which involve disabling said technologies when manufacturers allowed to do so (sometimes making the system unstable), overclocking/downclocking the GPU (germs' case), or running the application in compatibility mode for win7 (rarely worked).
Some have also improved their situation with a clean driver reinstall, by first creating a restore point, then using Display Driver Uninstaller to remove all video drivers and finally reinstalling drivers (since you guys are on laptops, you would need to get them from your manufacturers' websites).
Unless someone else wants to share a piece of his mind, I'm terribly sorry, but I'm quite out of ideas :/