I want to reinstall Device Manager itself (WinME)

Hello,

Many months ago I lost use of my sound card (Device Manager shows the yellow
exclamation mark). I also found that everytime I boot up, my USB mouse won't
work unless I remove it from Device Manager, then unplug and re-insert it.
Also SCSI controllers have yellow exclamation marks and can no longer be
used. Unfortunately I don't have a restore point to go back to, and
reinstalling Windows ME is not an option for me.

I know it's not a problem with the hardware, because it's a dual-boot system
and under the WindowsXP disk everything works fine.

I also know it's not a problem with individual drivers being corrupted,
because even new devices I install also appear with yellow exclamation marks
(including a software based virtual CD drive).

It seems the system files behind Device Manager may themselves be corrupted.

I work in tech support for a cable ISP and find it very common for Win98/ME
customers to lose the ability to connect their modems via USB, so I'm a
little bit familiar with this type of issue (one of the very few problems we
don't have a solution for).

So I would like to try restoring the systems files responsible for Device
Manager, using the MSConfig "Extract File" facility. Can anyone suggest a
list of appropriate files to restore, or point me in the right direction for
locating such a list?

Thanks.