Originally Posted by joshuasvc
OK, Go to the speaker with the green tick,
right click and go to advanced, see if it is set to 24Bit 48000Hz and the exclusive section has both boxes checked.
In the levels menu see that the level is set to the right side (max)
You could run the speccy program and see who makes your chipset, and look at the sound section. Then go to their sites and download the latest chipset and sound drivers
I will guide you in installing them once you have them.
Post back with results
I would reinstall SP2 as it helps to be as up to date as you can be.