Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Troubleshooting stop 0x7B and stop 0xED.

06 Jul 2015   #1
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 
Troubleshooting stop 0x7B and stop 0xED.

As Carrona.org says:

STOP 0x0000007B: INACCESSIBLE_BOOT_DEVICE
Usual causes: Hard drive, File system, Boot sequence errors, Device driver, and Virus infection (in particular check the MBR)
STOP 0x000000ED: UNMOUNTABLE_BOOT_VOLUME
Usual causes: Hard drive problem, File system problem, Improper boot parameters
Troubleshooting stop 0x7B and stop 0xED are different from those other bugchecks, because crash dumps are not obtained in these two cases, as there two bugchecks don’t allow to computer to boot up; neither in normal mode nor in safe mode. And that is why specific troubleshooting strategy is required for those cases.
Tip   Tip
If The computer is failing to boot without showing stop 0x7B or oxED, it is suggested to follow Troubleshooting Windows 7 Failure to Start.

information   Information
Tools needed:

What may resist the access to the boot files? If we list the possibilities up, out job becomes sort of easier. So let us list those possibilities up.
  1. Changed storage/SATA controller mode;
  2. Boot sequence error;
  3. File system problem;
  4. A problematic device driver;
  5. Virus infection;
  6. Improper boot parameters; and
  7. Hard drive failure.
    *
    If the HDD is not failing, then the easiest way to solve these two BSODs is to perform a Clean Reinstall.

Let us discuss them in detail.




Troubleshooting stop 0x7B and stop 0xED. 1 Troubleshooting stop 0x7B and stop 0xED.
Changed storage/SATA controller mode:


Generally there are three possible storage controller modes available, viz
  • IDE/ATA/SATA
  • AHCI
  • RAID
Windows boots using the storage controller mode on which it is originally installed. So, if by any chance the storage controller mode is changed to something other, then it will refuse to boot up.
In this case, boot into the BIOS setup. Notice very minutely what is set as the controller mode, and remember it*. Now apply the other mode available. Save the change and exit from BIOS setup.
Now try to boot to the computer. If it still does not boot, apply the other remaining mode. See how it goes.

If windows fail to boot with all the available storage controller modes, then storage controller is not the reason behind the issue. Apply the initial mode back (that you need to remember* properly) and shift to the next possibility.
information   Information
All the board manufacturers use different BIOS setups. So it is not a unique process to change between the storage controller modes. As an example, here is how to change them in a Gigabyte motherboard:
information   Information

  1. Press the “delete” key during POST to boot into BIOS setup.
  2. Go to Peripherals > SATA Configuration

    Troubleshooting stop 0x7B and stop 0xED.-1.jpg

  3. Double Click on SATA mode selection gives the option to shift between modes.

    Troubleshooting stop 0x7B and stop 0xED.-2.jpg
But the place and title for the same thing will be different on different boards.

BSOD cannot read error (quickly moves to a different screen)



Troubleshooting stop 0x7B and stop 0xED. 2 Troubleshooting stop 0x7B and stop 0xED.
Boot sequence error:


If the HDD/SSD containing the boot files is not accessible due to boot sequence error, that is also to be rectified within BIOS setup.



Troubleshooting stop 0x7B and stop 0xED. 3 Troubleshooting stop 0x7B and stop 0xED.
File system problem:


The file system on the HDD also may cause such a BSOD. Disc Check Commands are useful to detect those problems and attempts for possible recovery.
  1. Open a Command Prompt at Boot.
  2. Run Chkdsk from Command Prompt (Option Two of How to Run Disk Check in Windows 7)
For switches, /r and /f are recommended.



Troubleshooting stop 0x7B and stop 0xED. 4 Troubleshooting stop 0x7B and stop 0xED.
A problematic device driver:


It may be very hard in this case where windows refuses to boot. But if it is anyhow to possible to boot to System Recovery Options, then it may be attempted to detect the failing device driver.
Boot to System Recovery Options . Try Safe Mode with Command Prompt. In the command prompt .... enter the command ....
  • start msconfig
It will open the system configuration window, with the "general" tab selected.
  • Click the "startup" tab. Click "Disable all" > Apply > OK.
  • Click on "services" tab. Check the "Hide all Microsoft Services"; Click "Disable all" > Apply > OK
Then try to boot again normally. Is it failing still?

If so, boot to System Recovery Options once again. Try Enable Boot Logging. It will create a file named ntbtlog.txt. Collect it and upload it. If you cannot do it within windows, Boot with a live Linux disc and collect it in a USB stick, use the usb stick in another computer and upload it. Some of the members of the SevenForums will check your upload and guide you to the next.



Troubleshooting stop 0x7B and stop 0xED. 5 Troubleshooting stop 0x7B and stop 0xED.
Virus infection:


A virus or a malware, a rootkit or a bootkit (boot sector virus) may cause such a BSOD. In this case it is needed to scan the system with a bootable virus scanner.

There are a few of such scanners available. Windows Defender Offline is a good one to do this job.
information   Information
In a very little few cases it is seen that after a bootkit infection and its removal the 100 MB System Reserved Partition is converted to a logical volume. In such a case the point 6, Improper Boot Parameters will be applicable.



Troubleshooting stop 0x7B and stop 0xED. 6 Troubleshooting stop 0x7B and stop 0xED.
Improper boot parameters:


It may be seen that the boot files are not accessible because the right partition is not marked as active. To know the partitions and flags, it is best to use the Partition Wizard bootable CD.

In this case what is needed to do is ….
  1. If the 100 MB System Reserved partition is not a primary partition, convert the System Reserved Partition to a primary partition
  2. Mark the System Reserved partition as active
  3. Run Startup Repair for three separate times, with restarts in between every single run to recreate the boot files in that location. (Startup Repair - Run 3 Separate Times)
information   Information
For some OEM computers, the recovery partition is the active partition by default. In this case it is to make it sure that the active flag is there.




Troubleshooting stop 0x7B and stop 0xED. 7 Troubleshooting stop 0x7B and stop 0xED.
Hard drive failure:


A failing hard drive is the most common cause of a stop 0x7B or a stop 0xED BSOD. In order to detect it, a bootable disc check tool is needed.

Seatools for DOS is the best way to test the HDD in such a situation.
It is better to take the long test using Seatools For DOS.

If errors are detected, the HDD is needed to be replaced.






My System SpecsSystem Spec
.
06 Jul 2015   #2
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Thank you Arc.
Great job.
My System SpecsSystem Spec
12 Jul 2015   #3
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 

Thanks a lot, Jack. Got a chance to test it: BSOD cannot read error (quickly moves to a different screen)
My System SpecsSystem Spec
.

12 Jul 2015   #4
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

When one does as many BSOD as you do, tricks are learned. Some of them I don't understand but their is
a lot of things I don't understand. I get lost in the forest because of all the dam trees.
My System SpecsSystem Spec
06 Oct 2015   #5
axe0

Windows 10 Pro
 
 

Thanks for this troubleshooting guide Arc
If I had read this earlier, it would have been so much easier to troubleshoot the 0x7b
My System SpecsSystem Spec
22 Dec 2015   #6
BorisTheAnimal

Windows 7 Home Premium
 
 

Arc I don't know if you are still active but upon reading through this thread, I noticed this:

Troubleshooting stop 0x7B and stop 0xED.-interesting.png

I know this is a small thing.


My System SpecsSystem Spec
14 Mar 2016   #7
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 

Just noticed it, mate.

The text was there, in full, but a "]" in the options header was missing. So it became invisible.
My System SpecsSystem Spec
Reply

 Troubleshooting stop 0x7B and stop 0xED.




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
STOP 0x116: VIDEO_TDR_ERROR troubleshooting
NOTE: If overclocking, please reset the system to default values while troubleshooting it. Info on the STOP 0x116 error: BSOD Index More info on this particular error (applies to all video cards, not just AMD): AMD Game Forums - ATIKMDAG.sys problems and TDR FAQ Link broken New Link -...
Crash and lockup debug 'How To'
Can't boot into Windows XP-- Stop 0x7B
Every time I try to boot up, I get a blue screen. 0x0000007B (0xF8897528, 0xC0000034, 0x00000000, 0x00000000) It's possible that there's a virus preventing it from booting. I've tried booting from safe mode, but apparently there are DLLs missing. I don't have a Windows XP CD to do a System...
BSOD Help and Support
STOP: 0x7B
Hi all, please bear with me as i am not particularly technical! I was running a virus scan on my computer and it came up with a few viruses, removed them and told me to reboot. Upon rebooting, my computer now flashes up with this message for half a second and then goes to a screen asking to:...
BSOD Help and Support
STOP 0x7B and viruses
I've found (on a Vista 32 bit system at work) that there is a virus infection that will change the ACL's of a system in order to prevent booting. I'm running SUBINACL in Windows PE Mode to (hopefully) reset the ACL's. The registry is mounted - but I don't know if SUBINACL will find it. ...
Crash and lockup debug 'How To'
STOP: 0x7B Please Help
Hello All, So I turned off my computer the other day after a long weekend. I go to turn it on and I get the dreaded STOP: 0x0000007B error. Windows 7 gets this error and will reboot itself when the windows logo does its animation. I then rebooted the computer and selected repair your...
Drivers


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 17:42.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App