i got same problem except with my laptop. im using hp pavilion dv6128eu.
i got nvidia geforce go 7200. i only got this problem after awhile so i think its about version too or codecs. havent updated video card for awhile so it cant be because of that.
audio driver is Conexant High Definition . version is 3.26.0.050 il try by updating with that new 188.8.131.52 A wish me good luck