Restart the computer using a Windows98 boot floppy. When it boots into DOS mode, change it to access the C: prompt, then type "scanreg /restore" (without the quotes)(There are no spaces between any of the letters except leave a single space between "scanreg" and the forward slash)), then press the "Enter" key. A previously working registry will be found, select the one of your choice, then follow the prompts to restore that registry. It just might boot things back to normal.
Hope this helps.
Grif
I am running an old Desktop with Windows 98SE and have recently lost the sound and the sound driver.
The motherboard is Aopen Socket370 MX 3W Pro with chipset Intel810.
I found a driver on Driverguide (AC'97 driver for Intel(r)82801 Controller, installed it and the device mgr said ok!
The moment I tried to adjust the sound button a fatal exception error appeared which is 0028 : 00000013 and I can't get rid of it.
Safe mode does not help and I am truly stuck.
Can anyone help, please?
Thanks for trying.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic