1rst Try at Clean Install of 10122 breaks bootloader of Win 7

Have been dual booting Win 7 and Win 10 previews on two Samsung ssd's. I've had no problem with updating each build then extracting the Iso with ESD to Iso then doing a clean install until the switch from 10074 to 10122.

Let it update on fast ring - no problems.
Extracted Iso with ESD then did clean install.
Would boot to Win 10 but the Win 7 boot disappeared.
Tried everything - restoring image with Acronis, Win 7 repair disk etc. Nothing worked.
Reloaded Win 7 from scratch then tried again clean install of Win 7 and worked perfectly.

Luckily all my files are backed up on an external drive.
Any thoughts?
Jim

otisdog said:

Have been dual booting Win 7 and Win 10 previews on two Samsung ssd's. I've had no problem with updating each build then extracting the Iso with ESD to Iso then doing a clean install until the switch from 10074 to 10122.

Let it update on fast ring - no problems.
Extracted Iso with ESD then did clean install.
Would boot to Win 10 but the Win 7 boot disappeared.
Tried everything - restoring image with Acronis, Win 7 repair disk etc. Nothing worked.
Reloaded Win 7 from scratch then tried again clean install of Win 7 and worked perfectly.

Luckily all my files are backed up on an external drive.
Any thoughts?
Jim

Did you disconnect the Win 7 drive prior to the Win 10 install? The first time I ever tried a dual boot I forgot to disconnect the prior drive and it messed it up. Since I have always disconnected the Win 7 SSD and did a clean install of Win 10 on the other SSD. Never had issues again.

Vladimir said:

Install EasyBCD or VisualBCD, reintall legacy loader and recreate the entry for Windows 7. This should work!

:)

I will keep this in mind. I'm not the best at this. I will need to explore EasyBCD and see if I can figure out how to install the legacy loader.

Stealth - if I disconnect the Win 7 drive and Install 10 on the other will I get the dual boot screen when booting? I've been wondering about this.

It was time for a clean install of 7 anyway.
Thanks
Jim

otisdog said:

I will keep this in mind. I'm not the best at this. I will need to explore EasyBCD and see if I can figure out how to install the legacy loader.

Stealth - if I disconnect the Win 7 drive and Install 10 on the other will I get the dual boot screen when booting? I've been wondering about this.

It was time for a clean install of 7 anyway.
Thanks
Jim

Yes you should. I turned the computer off, ejected the Win 7 SSD (I installed front case drives just for this) did a normal clean install of Win 10 on the other SSD. Once it was totally done, I turned the computer off again, inserted the other SSD and started the computer again and it booted to the dual boot selection screen.