ASRock Z87 Extreme6 instant flash problems

Dear AsRock forum,

I am trying to update my ASRock Z87 Extreme6 bios, to the beta driver 2.80C, because I want to install a PCIe to M2-SSD.

I got my [URL=http://www.asrock.com/mb/intel/Z87%20Extreme6/#BIOS]official beta bios driver here[/URL] and followed the instructions - download file, put on usb stick under 4GB, formatted in fat32 and tried to instant flash.

The file(s) get shortly displayed, then it gets stuck on a recovery.txt (not present on the stick) - no mouse or keyboard input possible.

I tried all USB ports, different USB sticks, different bios versions (non-beta ones) and I get the same result every time.

I can't find anything in the forums or internet - what do I do now? I seems like I get something fundamentally wrong :/

Thank you for helping

Best,
T.

Have you tried using Windows 10 on this M/B? Mine ran OK under Win7 but it does not like Windows 10 with AMD graphics cards and locks up the system when installing any AMD drivers.