Stop 0x0000007B Error on Booting Windows 7

Upgrading from Windows 7 to Windows 10

It was Monday morning. I attempted to upgrade my work PC to Windows 10. My colleagues were able to upgrade to Windows 10 very easily so I thought it’d be a piece of cake.

Unfortunately it wasn’t an easy and smooth process for me and took a few hours to complete.

The upgrade failed with the following error:

We couldn't update the system reserved partition.

This error appeared to be common and I found a few possible things to try to fix it.

I followed the instructions from this blog post. My system reserved partition was 100 MB and full like the author of the blog.


  1. Install MiniTool Partition Wizard Free Edition
  2. Reduce the OS partion by 200 MB
  3. Increase the system reserved partition by 200 MB
  4. Hit Apply and restart my PC


After step 4, I was met with the following blue screen…

*** STOP: 0x0000007B (0xFFFFF880009A97E8, 0xFFFFFFFFC0000034, 0x000000000000, 0x000000000000)

0x0000007B corresponds to INACCESSIBLE_BOOT_DEVICE.

At this point, I wasn’t able to boot my PC in safe mode at all.

Startup Repair couldn’t do anything either. I couldn’t blame it because it found no OS so didn’t know what to repair!

Fix (which worked for me)

  1. Boot from Windows recovery disk
  2. System Recovery Options -> Command Prompt
  3. Run the following command (x is the drive letter where Windows is installed):
chkdsk x: /r
  1. Wait, wait and wait
  2. Restart and hope for the best

And this did the trick for me :)

I’m now on Windows 10 and so far so good!

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