I have windows 10 installed on my laptop (Toshiba Qosmio x770 - 2.4 gHz 2nd gen core i7 mobile, 8 gb of ram) as a testbed prior to upgrading my main PC.

There have been no performance changes between win 8.1 & 10, still opens quick, renders quite fast. Sorry to hear face_off is having issues, but no noticing any myself.

I do run with user account control at never notify settings, however, as I am a desktop engineer by trade & like having as much control as possible.

Hope you fix your win 10 issues.