Roughly, hardware acceleration has the hardware "chip" doing any
decoding instead of having the software (windows) doing it. Turning
down the acceleration is the first step to determine if there is a
potential problem with the drivers for the hardware involved. you
should turn it down a "notch -at-a-time". If your problem goes away,
then you should check to see if there's a newer version of the
hardware drivers available. If none is available which would allow
full acceleration, then your choices are to: a) continue to run with
the acceleration turned down to the level which no longer causes a
problem, or b) replace the hardware (sound card) with one that has a
higher performance level. (either a different model or a different
manufacturer)