Sorry for the delay in my reply. Since your not familiar with the Event Viewer, let's forget about it for now. It would be useful if you experience an issue with your sound again to be able to check the Event viewer to see if there are any hints of why this happened. I have found it useful with some issues, but with this particular issue, it may not be as helpful. It might not even log anything when this occurs, but you can never cross out any steps that may give you a clue of why you are having a problem. At the end of this post, I will give you a few more links so you can have a better understanding of the Event Viewer.
I want you to verify that you have the latest driver for your integrated sound device.
1. Click Start
, click Control Panel
, click Performance and Maintenance
, and then click System
2. On the Hardware
tab, click Device Manager
3. Double-click the Sound, Video and Game Controllers
4. Find and Double click on the RealTek device that is part of your computer.
5. Click the Driver
6. Verify that you have the latest version of the driver mentioned above.
If you do not have the latest driver, please reply back with the version and date of your driver.Event Viewer - Wikipedia, the free encyclopediaHow to view and manage event logs in Event Viewer in Windows XPUsing Event Viewer