Found this solution: Fix for Citrix XenApp Published Apps Disabling Windows Visual Effects | Aaron Walrath - Another IT Guy's Meanderings
Tested to be working even after starting citrix receiver...

Mine turned black by itself somehow.
Disabled and re-enabled animation and lock screen background came back. Nice find.

Update: Just turned back to black again... For this time, there was a...

Thank you! Fixed mine too, R7-572G, just registered to post this reply here XD

Just that haven't got dolby digital plus working yet.