Actually the driver from the "hack" has been updated since the "hack" was described for the first time, but the updated driver still is not certified to windows 8(.1).

But do you (or others) know if there are any sideeffects of installing this one driver as a "non-certified" driver in windows 8.1? Security? Stability on longer sights? (PC is totally stable right now with current drivers).
Anything else I might want to do/try?

Thank you for your time spending on "my" problem. I know I'm not alone with it, so maybe others can benefit from a solution, I hope so.