After bios update getting bsod

[lapioks]

Hi. I have Gigabyte Z170x gaming 3 eu rev 1.0 mobo. It was working just fine for a year and now after f20 bios update I get bsod "unmountable boot device" then pc restarts, beeps 4 short times and enters bios. Then I reboot pc and everything wokrs fine. This thing repeats once every day at computer start after beeing off for 10+ hours. I tested it memtest86 and no errors were found. I have Windows 10x64, ddr4 kingston furry X 2x8GB 2666mhz, i5 6600k (non overclocked), m.2 samsung ssd, toshiba ssd, gigabyte 1070 xtreme, psu corsair rm 1000 (baught used).  How to test is what really is happening?

[dmdilks]

Why did you update it ? Plus go back to F20b. F20 has bugs in it.

http://forum.giga-byte.co.uk/index.php?topic=17957.0

[lapioks]

There is no F20b bios from download page

[absic]

If you didn't make a back-up copy of your BIOS before updating and you now want to go back. Pop over to Tweaktown here: http://forums.tweaktown.com/gigabyte/28441-gigabyte-beta-bios-post274574.html#post274574 where you should be able to find previous BIOS versions for your motherboard.

Just noticed, there is also a newer Beta BIOS F21b available and it might be worthwhile trying that before going back.

[lapioks]

I will try F21b bios. I will write later what happens.

[lapioks]

If you didn't make a back-up copy of your BIOS before updating and you now want to go back. Pop over to Tweaktown here: http://forums.tweaktown.com/gigabyte/28441-gigabyte-beta-bios-post274574.html#post274574 where you should be able to find previous BIOS versions for your motherboard.

Just noticed, there is also a newer Beta BIOS F21b available and it might be worthwhile trying that before going back.

Bios F21b fixed my issue. Thank you for suggestion.

[absic]

Pleased to be able to help. 

[lapioks]

That bsod occured again. I think that it is windows 10 bug. After marking fast startup on power button configuration that bsod disappeared  but now instead of bsod I get black screen with mouse pointer.