The on board audio of my laptop (Toshiba Satellite L655)has also stopped working after an otherwisw successful upgrade from Win7. Device Manager informs me that both drivers are up to date and working properly,but under Events I found this information
Device HDAUDIO\FUNC01&VEN14F1&DEV5069&SUBSYS1179FD10&REV_1003\4&169ca5e6&0&0001 requires further installation.
A similar message was listed under Events for the other driver, but what needs to be done? Help please.