This symptom has been verified by Symantec.
The solution referred below includes registry operation.
Registries are very important files for the Windows system.
Improper editing of registries may cause Windows to fail to startup and force the reinstallation of the entire system with the Recovery CD-ROM.
Sony is not liable for any problems that may occur from the editing of registries.
Article ID: 20021129141647958
Last Modified: April 15, 2003
Title: Default Sound is missing after installing Norton AntiVirus.
For further details, please contact Symantec.