|You are lucky the computer even boots. You need to download and install all the drivers for your computer. OEM disks only have the necessary drivers for the hardware they were made to run on.|
Go to Device Manager to see if the sound is working properly. If it says it is working then you may need to configure the speaker ports, if you have HD sound.
I can't be more specific because you are making us guess at your hardware.
Go to the manufactures site to get the drivers.