WOOHOO!! I fixed it! Here's a link to a site with 10 fixes.http://www.codecguide.com/fix_for_flash_sound_problems.htm
What ended up working for me was K-Lite Codec Tweak Tool option. Every time I tried to check the option to fix the sound (Midi, WaveOut), I would get an error that said
"Error creating registry key
REGCREATEKEYEX Failed; Code 5
Access is Denied"
So I went to Start -> Run and typed in Regedit.exe
, and I found this folder. I right clicked on and went to permissions, and I went through and allowed everyone to access it. Even through the advanced tab. I pretty much checked every allow box that i could find. So I went back to run the K-Lite Codec Tweak Tool, and the option to fix the sound (Midi, WaveOut) was greyed out. So I went to Youtube and it was working again. I hope this helps! Good Luck!