have a Toshiba Satellite E55-A5114 laptop. Have recently installed Windows 8.1. Device Manager shows 2 high def audio devices, one of which will not start. It is High Def Audio Dev VEN_8086 DEV_2807 SUBSYS_1179FA0B. I am not able to locate a driver. I uninstalled but it continually reinstalls with the same status. Any help would be appreciated.