Windows – Drivers problems in Asus Zenbook on Windows 8

Our zenbook also crashed after installing 8.1. Asus repairer advised that the motherboard had to be replaced, which apparently is where the solid state drive is located, and presumably windows operating system and recovery partition. Asus help desk advised that 8.1 was unstable and could corrupt the bridge to recovery partition. I am going to stay with 8 and create my own shut down and start menus http://www.computerhope.com/issues/ch001374.htm

http://blog.laptopmag.com/how-to-shutdown-windows-8-in-just-one-click

I would suggest you try the following:

Make sure both the USB driver "Downloaded USB 3.0 driver: Version 1.16.2.0" and chipset driver "Downloaded Chipset driver: Version 5.12.0.13" you mentioned in your question are installed on your system.

Then, from device manager, select the unknown device AMD USB 3.0 Host Controller right click and chose remove then reboot your system.

When windows starts up after reboot it should try to install driver for the newly found hardware, if it asks for a driver placement choose "have disk" (or whatever it's called) and point the installer to your AMD chipset driver (somewhere in the folder you point to there should be an *.inf file)

See if that helps..