Welcome.
Windows 10 has some start problems, I couldn't get any sound at all, nor my DVBViewer to show video. Power DVD 14 Ultra gave video, but no sound. I spent a few hours trying to find out a solution, but I noticed that it's happened to many. Since I need my computer to earn my living, as well as enjoyment, and being quite busy, I decided to go back to Windows 7. Most probably a Service Pack is released quite soon? And I still get the Widows 10 upgrade "nag" each time I start my computer.
Best wishes.