I've upgraded my Windows 8.1 lappy I bought early this year to 10 yesterday.
First thing I did was to listen to youtube.
Googled, and got my answer (had to go in to sound settings and change bitrate).
Looks like it's going to be a Googling week coming up...
I've never had anything like that. Had to adjust iTunes to work with bluetooth but that was it. I much prefer it to 8 - although 7 was alright.
Upgraded my 8.1 and Win 7 to Win 10 and had no problems
You might want to do some extra tweaking mind...
I did get the YT issue though , it sorted itself out next day with an windows update .
We've discussed most of that here,
here and, if you miss the old games
WORD OF WARNING It would appear that M$ turns a heap of stuff back on with its updates, because a lot of stuff I had turned off when I loaded Windoze was back on when I just checked it. It may be prudent to revisit your security settings periodically.