✔ 最佳答案
Looks like your on board sound card driver is corrupted.
Try:
1. Proceed if you have the set up CD for your motherboard. Go into your device manager / Sound controller / Realtek HD , right click and unistall the driver. Insert your set up CD and select to install the Realtek driver. Shut down then reboot to try. Another way is to go on to the motherboard manufacturer website, match and download then save it before installing.
2. If you haven't got the CD, go to Start > All programs > Accessories > system Tools > System restore. Run restore to an earlier date. Pick a date in bold numbers just prior to the audio failure. Follow prompt until finished. XP will reboot then try it again.
Note: you'll lose all programs installed after the restore-to-date so be patient and don't go too far back in the calendar. All your work, however, will stay in your PC unchanged but I always recommend to do regular USB back ups, just in case.