Toshiba Amd Quad Core A6 5200m Accelerated Processor Laptops

Permanently disable driver signing windows 8 / 8.1!!!!, Try the following from this microsoft forum thread. you have to disable uefi secure boot in bios setup before attempting to disable driver signing..

Permanently disable driver signing windows 8 / 8.1!!!!, Try microsoft forum thread. disable uefi secure boot bios setup attempting disable driver signing..