Machine is a Toshiba Satellite P100 laptop just over a year old, came with Vista installed. No problems until today when Vista SP1 was automatically downloaded and installed. Now I have no sound from either speakers or headphone output.
I have uninstalled and reinstalled the Conexant Hi-Def Audio driver to the latest recommended version on the Toshiba website.
I have tried restoring to before the time when SP1 was installed.
I have updated the BIOS to the latest one given on the Toshiba website.
After hours of installing and rechecking I discovered that the loss of sound is caused by an incompatibility between Vista SP1 and Roxio Media Creator 9. Removing it brings the sound back, installing it makes the laptop mute.
items listed in device manager also look in control panel under sounds & devices then click on Audio and see if your audio device is listed in the oblong box here or is avail by droping down the box and change it over.
Or roll back the driver ? from properties in device manager option.
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