Dear all,
I ll be the first to admit that I have created this mess, but now got so far stuck that I can't find a way out anymore. Any help is very welcome!
What I did:
Reinstalling the "Work" drive would only be a last last last resort option.
Maybe the below DISKPart / EasyBCD overview helps:
https://drive.google.com/file/d/1ZUo5AagaXF65w_xYS6hRSKMeZUb27waa/view
Thanks!
I ll be the first to admit that I have created this mess, but now got so far stuck that I can't find a way out anymore. Any help is very welcome!
What I did:
- I started with 2 perfectly running win 10 pro installations on 2 different drives ("Work" drive and "Play" drive), with every restart ending up at the WIN 10 UEFI Dual Boot Screen.
- Then I decided to reinstall the "Play" drive, so I deleted all partitions on this drive and installed WIN 10 Pro through my USB drive created with the Windows Media Creation tool.
- I now believe that this drive originally contained the Boot sector and had a GTP table.
- Upon restart I could only boot into the new "Play" drive, which was now in MBR table (MB is set to UEFI + CSM mode).
- I manged to rebuild the Boot sector on the "Work" drive with bootrec /FixMbr bootrec /FixBoot bootrec /ScanOs bootrec /RebuildBcd. Which allowed me to boot to both drives, but only by going into the boot menu (F12), so no DUAL Boot Screen.
- Running Diskpart I noticed that now both drives were in MBR. Thinking this might be an issue I converted both to GTP with the win 10 MBR2GTP commands.
- This didn't change anything either. On restart I didnt get any DUAL Boot screen and could only get to the "Play" drive by going into the Boot menu, or changing the Boot order in the BIOS.
- I then decided to install EasyBCD on the "Work" drive and added the to bootable drives. This worked ONCE. On restart I got the UEFI Dual boot screen and booted to the "Play" drive.
- Restarting from the "Play" drive however got me straight back to the "Play" drive and restarting from their did the same without any dual boot screen.
- Then I thought I ought to install EasyBCD on the "Play" drive as well, which I did.
- This resulted in No dual boot screen and trying to boot to the "Play" drive I got a “No windows installation found”
- Now desperate I ran an auto-repair from Easy Recovery Essentials on the "Play" drive. Upon restart I didn't get any dual boot screen and booting (F12) to the "Play" drive resulted in a BSOD stating, "inaccessible boot device".
- Checking the "Play" drive in Diskpart showed that Easy Recovery Essentials has converted the "Play" drive back to MBR.
- ... and that where I am at!!
Reinstalling the "Work" drive would only be a last last last resort option.
Maybe the below DISKPart / EasyBCD overview helps:
https://drive.google.com/file/d/1ZUo5AagaXF65w_xYS6hRSKMeZUb27waa/view
Thanks!