This is not a question.... but I'm a bit confused... I had installed win 8 activated with WMC free key... everything working fine and I did a bios upgrade that to went fine... but as soon as the upgrade completed system restarted (as usual) and I found my windows completely broken and wouldn't boot and on next reboot entered recovery mode... it tried system restore failed... it tried all possible recovery option but won't work... I had a complete reinstall of windows... any one knows y this would have happened...
Check the SATA settings. If they are set to AHCI before bios upgrade & the default is IDE/Compatible then after bios update Windows can't detect the hdd & should crash.
There is an option in BIOS's integrated peripherals (storage) "SATA Mode". It can have values IDE, AHCI, RAID. When you flash the BIOS the system default value is selected and if it different from the one used for Windows 8 installation, the system will not boot with INACCESSIBLE BOOT DEVICE BSOD screen. Just change the value and try to boot. When you will boot successfully, you can enable other two methods (drivers) in system registry.
isn't it also possible that on the "old" "bios" uefi wasn't enabled and after Flash it got enabled ? I did read some Things about it here and Windows Need to be reinstalled after changing that
UEFI boot enabled means you can now boot from a media that has UEFI boot entry in it. It doesn't mean that your previously MBR formatted HDD will stop booting.
I already stated that I had a reinstall later and everything is fine... I have posted this so that this don't occur next time... and yes others may get use out of my experience
Of course everything was fine after a reinstall, that was not the issue. What they are trying to tell you is that after your bios update your bios settings went back to default. This put your sata mode setting in IDE mode and your Win8 was most likely installed in AHCI mode. You did not need to do a format and reinstall. You just needed to go in to the bios settings and put your sata mode setting back in AHCI mode and your system would have booted up. Anyone that does a bios update should know what values their bios is setup with prior to the update. Update: after reading your comment again I am not sure if you are acknowledging that if it was the sata mode setting or not.