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

Last response: in Motherboards
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January 20, 2014 8:22:09 AM

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 ?
a b * Windows 8
a c 94 V Motherboard
January 20, 2014 8:28:04 AM

sound like some bios settings was overwritten when you flash the bios.
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January 20, 2014 8:35:27 AM

rgd1101 said:
sound like some bios settings was overwritten when you flash the bios.

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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a b * Windows 8
a c 131 V Motherboard
January 20, 2014 11:02:29 AM

Check your HDD SATA mode in the BIOS. Choices should be IDE, AHCI or RAID. Whichever one it is on make note and try the other 2.

Yogi
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a b * Windows 8
a b V Motherboard
January 20, 2014 12:51:03 PM

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.

Y0GI said:
Check your HDD SATA mode in the BIOS. Choices should be IDE, AHCI or RAID. Whichever one it is on make note and try the other 2.

Yogi


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January 20, 2014 6:13:49 PM

johnbl said:
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.

Y0GI said:
Check your HDD SATA mode in the BIOS. Choices should be IDE, AHCI or RAID. Whichever one it is on make note and try the other 2.

Yogi




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

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January 20, 2014 6:18:13 PM

would re-installing windows help as the install is only a day old and nothing would be lost?
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a b * Windows 8
a b V Motherboard
January 20, 2014 6:28:08 PM

- do you have more than one drive in this system?
-disconnect any extra USB devices including thumb drives and wireless usb cards (they can be discovered and the system will try to find the OS files on the wrong device)



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January 20, 2014 6:35:02 PM

johnbl said:
- do you have more than one drive in this system?
-disconnect any extra USB devices including thumb drives and wireless usb cards (they can be discovered and the system will try to find the OS files on the wrong device)



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

a b * Windows 8
a b V Motherboard
January 20, 2014 6:51:39 PM

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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January 20, 2014 7:30:42 PM

johnbl said:
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.


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