Had TotalMedia Theatre6 downloaded as trial version: worked flawlessly. Then of course the - ordered associated program package - as I thought. However, I was taken aback already when unpacking: Copyright 2008, certified for Vista? Well, are indeed the compatibility mode .... When you install an update immediately with reboot - after Blu-ray and DVD drive can not be found. Okay, the solution is on the net: fiddle just a little to the registry: there they are again. Now it may thus go: Player starts: oh - an update. Okay, then so too does the still, after restarting the drives were even there yet. But now really going on: so, if the program would not suddenly stop its function right after the start. The player simply does not start playback, but ends virtually even. Well, there was still the message concerning. "Known compatibility issues". That can of course be solved under Windows 8.1: it is not a beginner. The program apparently already "TotalMedia stops working you will be notified ... and so on." Well then: perhaps the additional program components for the disaster are indeed to blame: So everything uninstalled up to the player. Waste of time with the same result. Okay: uninstall everything and just play the player (now you can read the previous description up to this point again: after all, the program is reliable when it comes to these issues - so update 1, no longer drives, Update 2, exit). Last try: could indeed be the Launcher, so called the * .exe file directly: "TotalMedia stops working, you will be notified ....". There is now sufficient, I think, and decide that this is not just me, but that it is a completely outdated and therefore now Sch - is program. Should anyone that thing on Windows 8 or 8.1 to properly function bring (one requires not much, only occasionally look to a Blu-ray), please message to me - Thank you !! Oh yes: the total media player that works so well in the trial version, costs $ 99.99.