All of this is interesting, but it doesn't solve your problem. To do that, you may want to install a quality sound card in your machine. Sound Blaster and Ad Lib are good choices. Look at the ads carefully. If two machines boast the same components, but one is hundreds of dollars cheaper, have doubts.
Many computer magazines carry detailed reviews of computer systems.
You can also find reviews online. Be a wary buyer. The following check may also help you to determine whether your sound card, video card and modem are up to snuff or were manufactured in the jungles of Borneo. Go to the Windows Control Panel. You get there from Start, then Settings.