I've had this problem for a few months now and it's really annoying. When I boot my system the "logon" sound takes at least a minute or two to play and before that the system is practically frozen. Also when I play videos on youtube, sometimes they freeze for 20-30 sec before the sound plays.
I did a clean boot and the system ran smoothly, but the sound still lagged. I guess it's a hardware problem? Any advice would be appreciated