New
#1
That's it, giving up on Windows 10.
Have two identical Surface Pro tablets in front of me. One on Win8 and one on Win10.
Win10 version has issues playing flash videos in Firefox. Videos are just a black screen.
This happens on a fresh profile, and after a Win10 reset this pc.
Have done the usual flash player song and dance, uninstalled, installed latest, turned off hardware accelloration, even repaired subinacl. Only thing that fixes flash is jumping all the way up to a Nightly build of Firefox, but of course because of Mozilla's own messing-around, that completely breaks some game-breaker addons that I need to keep working (Mostly All In One Sidebar).
Since flash plays perfectly fine on Win8+FireFox combination I'm just going to use that, and stop it updating to the later builds which are currently in Nighly channel so that I retain access to addons in a working condition.