Unplayable FPS on/after startup

If more people are having this issue, that would explain why I am on such a machine… heh

Edit: Yep. I downgrader drivers once doing a clean install to the previous one. It’s smooth again.
Although I’m still getting the error message:

[1124/132018.432:ERROR:mf_video_decoder.cc(747)] Unsupported codec by MfVideoDecoder: 6

and I’m still having lag and the same messages starting up WoW:

[1124/132151.857:ERROR:mf_video_decoder.cc(747)] Unsupported codec by MfVideoDecoder: 6
[1124/132247.048:ERROR:mf_video_decoder.cc(747)] Unsupported codec by MfVideoDecoder: 6
[1124/132248.327:ERROR:mf_video_decoder.cc(747)] Unsupported codec by MfVideoDecoder: 6
[1124/132248.333:ERROR:mf_video_decoder.cc(747)] Unsupported codec by MfVideoDecoder: 6
[1124/132248.333:ERROR:mf_video_decoder.cc(747)] Unsupported codec by MfVideoDecoder: 6

I wonder what more could be wrong with my PC but I don’t really know where to go with it. (It’s not like Microsoft support forum has actual people from Microsoft on it.
But I guess this is what I get for trying to build a machine on my own. Heh…

edit: that link doesn’t solve the error msg

Update: After being in contact with NVIDIA’s customer support, downloading Revo Uninstaller and doing a real fresh installation of their drivers, the game runs smooth as butter on the latest update.

I’m still having these video decoder errors in some of my logs, but it’s not causing a problem for me atm.