Is the master volume or any of the other volumes set low? Checking threw
Start -> Control Panel -> Sounds and Audio Devices
In there are a few different volume settings that might be set to low. In the volume tab If you click the Advanced button under the Device volume it brings up a few different audio options, inculding master volume. I'm not sure if you checked that yet if not, I hope that helps. (I wasn't sure if you meant volume controls on the computer or on the speakers...some speakers can have several different types of volume control)
Are you using a seperate sound card, or a integrated sound card?
EDIT: I have my control panel set up under classical veiw, if you do not click
Start -> Control Panel -> Sounds, Speech, and Audio Devices -> Sounds and Audio Devices
Edited by Seth_z, 04 August 2006 - 09:01 PM.