you can't use q-flash, you have to create a dos bootable usb, dump the contents of the bios update zip onto the flash drive. Also, the autoexecute.bat file in the bios files, open it with textedit and change it to read "FLASHEFI Z68XPUD5.U1A". once you have the bootable usb made, dump the three bios files on the root of your usb, then restart and boot from your usb stick, then follow the prompts.