On Win 7, the audio icon on the system tray area shows ‘disabled’, go to service list, find that the ‘Windows Audio’ service is disabled, try enable it:
1. enable ‘Windows Audio’, it prompts the dependent services are not running
2. enable its dependent service ‘Windows Audio Endpoint Builder’, it prompts ‘Error 1722: The RPC server is unavailable’
3. check the ‘Remote Procedure Call (RPC)’ and ‘Remote Procedure Call (RPC) locator’ are enabled, check the ‘DCOM Server Process Launcher’ is enabled
4. if the services in step 3 are all enabled, but the audio service still can’t be started:
5. enable the ‘Power’ service
Don’t know why, but it works.
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