HELP. instant flashed z68 extreme4 gen3 bios, now instand bsod as windows loads

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A

Aidan Quinn

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Jan 20, 2014
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Recently flashed my bios as it was recommended, ( i realize this was a mistake now..) Now when ever i boot the computer it starts to load up windows (8.1) and i instantly Blue screen of death when it load,( no time to do anything within windows.) the error that pops up on the blue screen is "inaccessible boot device". any advice ?
 
Solution
J
if you can boot onto a windows disk and see your hard drive you can repair the disk or wipe it and reinstall, just make sure your BIOS has the correct SATA mode selected before you start. (generally AHCI will be the fastest mode)

here are the repair commands i would try (mainly if i wanted to get something off the drive and not do a reinstall)

Bcdboot.exe C:\windows
BOOTREC.exe /FIXMBR
BOOTREC.exe /FIXBOOT
BOOTREC.exe /REBUILDBCD
BOOTREC.exe /SCANOS

you might need to mark the partition as active using diskpart.exe:
Diskpart.exe
LIST DISK
SELECT DISK (followed by the number of the disk )
LIST PARTITION
SELECT PARTITION (followed by your partition number)
ACTIVE
EXIT



reboot and see if you have your windows back.
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A

Aidan Quinn

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Jan 20, 2014
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Thats what i thought had happened but i cant identify a setting that has changed that would cause this? i assume that it has somthing to do with the HDD

 
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J

johnbl

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Nov 4, 2012
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Yes, this is the most likely reason of the failure, when you flash the BIOS it will be set the the default values. If the SATA mode changes windows will not be able to read the contents of the drive correctly to load its files and will bugcheck early in the boot process. Most of the time you will want AHCI mode but you need to use the mode that was in use when windows was installed. generally this is not a big issue, change reboot you should be up and running within the next two boots (try AHCI advanced host controler interface first)


there can be other causes: default boot drive might need to be selected, boot priority might need to be selected
all of these settings can change when you update your BIOS or restore default settings.



 
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A

Aidan Quinn

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Jan 20, 2014
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10,510


I have tried IDE, AHCI and RAID multiple times allready and none of them work, all produce the same error.

 
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A

Aidan Quinn

Honorable
Jan 20, 2014
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10,510

it does have 2 drives and now
I have everything unplugged but the main hdd and the keyboard
 
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J

johnbl

Polypheme
Nov 4, 2012
10,071
185
67,090
if you can boot onto a windows disk and see your hard drive you can repair the disk or wipe it and reinstall, just make sure your BIOS has the correct SATA mode selected before you start. (generally AHCI will be the fastest mode)

here are the repair commands i would try (mainly if i wanted to get something off the drive and not do a reinstall)

Bcdboot.exe C:\windows
BOOTREC.exe /FIXMBR
BOOTREC.exe /FIXBOOT
BOOTREC.exe /REBUILDBCD
BOOTREC.exe /SCANOS

you might need to mark the partition as active using diskpart.exe:
Diskpart.exe
LIST DISK
SELECT DISK (followed by the number of the disk )
LIST PARTITION
SELECT PARTITION (followed by your partition number)
ACTIVE
EXIT



reboot and see if you have your windows back.
 
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Solution
A

Aidan Quinn

Honorable
Jan 20, 2014
9
0
10,510


re installing ended up fixing the problem, thanks for your help !
 
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