I bought a new hard drive because my other ONE died. I installed XP on it with the reinstall disc. It seems as though it's working fine, but now my computer doesn't have sound and cannot connect to wireless. I'm sure there are other things not working, too. Any suggestions as to how to fix this? Thanks!what kind of computer laptop or desktop also on some devices you have to INSTALL drivers for them.It's a Dell Inspiron laptop. Where would I find these drivers? i would go to the dell website and then download the correct drivers for your model laptop. Try this: Click Start then Run and type in Devmgmt.msc

This will take you to Device MANAGER. You will see all of your devices listed here. If you see a yellow"?" or red "!" then you need a driver for that device.
go: to http://support.dell.com/support/downloads/index.aspx?c=us&l=en&s=gen
and enter your model or service tag (your service tag should be on the sticker on the bottom or side of your computer) and look for the drivers you need. If you download and Run the files it should fix your problem

Also, when you bought your computer, it should have came with a bunch of disks. Look through all of the CDs that came with it. The original drivers disk should be in there. It might say something like: DRIVERS AND UTILITIES. It is easier to install the drivers from this disk.

P.S. After you fix all of your drivers the next thing you should do is go to microsft update and download and install all of the updates for your machine.I installed the drivers/utilities from the disc - managed to get my sound back. I still can't get my WiFi to work, though. It keeps giving me a message that says, "Net adapter not available in system," or something like that. And finally, my computer will no longer hibernate or go into STANDBY, even though I enabled hibernate. Any more suggestions would be appreciated!

I'll do to the Dell site now and see what I can find there. At Dell's site enter your service tag # that's on the machine and they will list all your drivers.
Whenever an OS is installed all drivers are wiped out and need to be re-installed.
Start with the MBoard drivers...these should always go first.All fixed now. Thanks guys!