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Full Version: Windows 7 Dualboot Failed to boot after allocating space
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Hello there,

basically, I have a computer which has 4 partitions (storage, system reserved, Windows 7 Ultimate, and Professional).
The Professional partition was running out of space (around 3GB left), and I wanted to allocate more space.

I used a free partition editor tool (namely AOMEI Partition Assistant Standard Edition 5.8) to shrink and allocate more space.
I took about 20GB of space from the Ultimate partition, and gave that space to the professional partition so it has ~23GB.

I then rebooted the computer to go back into the professional partition so that i could continue transferring files from the other partition.
I can boot into the Ultimate partition, but selecting the Professional partition now gives me this error: the required boot device is inaccessable.

I know that the partition is accessible and that the partition as fine as I can simply access it via the file explorer on the Ultimate partition.
For reference, I have also attached a screenshot of my partitions to this post.

My end goal is be to make the Professional partition bootable again, so I don't have to undo my changes.
E.g: transfer all of my documents/software/updates across to the other older/slower installation of Windows.

Any help would be appreciated, thanks.
(11-13-2018, 04:09 PM)Compton Wrote: [ -> ]check the hard drive health  https://briteccomputers.co.uk/forum/showthread.php?tid=695

Hello. I have followed the guide of using CrystalDiskInfo (I downloaded version 7.8.3), and attached below is the information it reports.

  1. ok down and install easy bcd https://neosmart.net/Download/Register
  2. select add new entry
  3. enter a name for the os
  4. select which drive letter Professional is installed on
  5. select add entry
  6. select  edit boot menu  
  7. select save settings



[attachment=3876]

[attachment=3877]

[attachment=3878]
(11-13-2018, 05:53 PM)Compton Wrote: [ -> ]
  1. ok down and install easy bcd https://neosmart.net/Download/Register
  2. select add new entry
  3. enter a name for the os
  4. select which drive letter Professional is installed on
  5. select add entry
  6. select  edit boot menu  
  7. select save settings

I have installed EasyBCD, added a new entry for the drive, and saved the settings.
Choosing to boot from either one of the two partitions work now, and they have a more recognisable name.

Thanks so much for the support, Compton.
This thread can now be closed.
gold you got it working