OK, one problem at a time...
Sound first... do you have both cmedia and via drivers installed? Do you have onboard sound and a sound card for instance?

The via drivers are the ones you are supposed to have according to the motherboard manufacturers, but it won't be the first time that the information on the website is wrong. If you have both the cmedia drivers and the via drivers installed, they might be butting heads, so uninstall the cmedia drivers from add/remove programs and/or from device manager.

From the looks of your report, you have not installed the via 4 in 1 drivers. go here and scroll down to the bottom of the page, you need the "retro" drivers. Download them to a directory called chipset (not to desktop). Unzip them to the directory you downloaded them in, then find the setup.exe and double click it. You want to install all of the options.

Locking up
OK, the locking up could be related to the sound, but it could be anything from
Overclocked CPU
Bad Ram
Flakey Power Supply
Heat
Failing onboard or pci card
Motherboard capacitors bulging and/or leaking
IRQ fighting instead of sharing.