Not technical at all. FlashPlayer was crashing. Installed 14. Deactivated 13. Now videos play, but no sound. Suggestions?

Pretty much what it says.  I am not technical and FlashPlayer was crashing on Mozilla.  I checked the plug ins.  Installed 14.0.0.215 (I think that's correct) and still problems.  Disabled 13.0.0.214.  Videos now play, but there is no sound.  I checked the speakers everywhere I could and there doesn't appear to be a problem.  Suggestions?  Thanks.