Audio Card incompatible?

Well after I installed Windows 7 ultimate 64 bit I noticed whenever I run any kind of media it starts to skip and freeze, it happens a lot when playing music. This also happens when no other programs are running so i know it can't be from that. I have installed all of the latest drivers for windows 7 and I also updated my bios. Could this problem be happening because the on-board sound card is incompatible?

MSI Gx630
cpu: AMD Athlon x2 64
RAM: 4gb
HDD: 250gb
Graphics: Nvidia Geforce 9600gt
Chipset: Nvidia MCP77

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