Problems after updating bios

[fnkmstr]

I decided to update the bios today, downloaded the latest available version from the MSI website, flashed successfully but windows wouldnt boot. I (kinda) sorted that, managed to boot into windows but pc started rebooting/giving black screens where cpu fan stops spinning while psu, gpu, case fans spin until I press the restart button manually. So I then downgraded the bios to the one I used before, but the problems continued. Basically windows bootup is longer but it boots, but then reboots/freezes randomly, sometimes after 10 seconds sometimes after 30 minutes.

 

After 3 or so reboots/crashes windows recovery boots up with the BCD error code 0xc0000098 which is probably caused by me trying to fix it not booting in the first place after the bios flash. Pressing "F1 to enter recovery enviroment" causes the pc to crash/bootloop/black screen again. 

 

Managed to download windows iso to try fixing BCD but it crashed while i was making the bootable usb drive with rufus, so no repair available at the moment. 

 

Tried switching the gpu to another one

Tried taking out ram sticks, different slots

Tried disconnecting all drives except ssd

Cleared cmos multiple times

Tried safe mode, still crashing

 

Pc was running stable for a year before this without any hiccups until that bios flash. 

 

Build in question:

 

Ryzen 5 2600

Msi b450m mortar

16gb gskill aegis 3000mhz

Rx580

Bitfenix formula 450w 

 

 

 

[RadiatingLight]

Does the motherboard allow you to downgrade the BIOS?

If so, do that.

[fnkmstr]

6 minutes ago, RadiatingLight said:

Does the motherboard allow you to downgrade the BIOS?

If so, do that.

I did that, downgraded to version I used previously, problems continued 

[fnkmstr]

Found out that Ez debug led CPU lights up on the motherboard right when screen goes black before I have to manually restart. Did I fry the cpu or motherboard while flashing bios?