dual boot Win8.1 with Win7 ,reboot after I select Win 7

NavyLCDR · 11 May 2020

In Windows 7, open a command prompt with administrator privileges and run:
bcdboot C:\Windows

spunk · 11 May 2020

I would first go to Disk Management and rename the Windows 10 drive to Windows 8.1 just so you don't get confused.
Next, download EasyBCD and use it's boot loader. It's free, you just have to register. Check out their User guide

frozensun · 15 Jun 2020

NavyLCDR said:

In Windows 7, open a command prompt with administrator privileges and run:
bcdboot C:\Windows

What that does?

Compumind · 15 Jun 2020

frozensun said:

What that does?

https://docs.microsoft.com/en-us/win...ons-techref-di

Copies the boot environment files to the system partition.

frozensun · 18 Jun 2020

NavyLCDR said:

In Windows 7, open a command prompt with administrator privileges and run:
bcdboot C:\Windows

But I do get boot manager of Windows 8,I mean boot screen to choose which OS to boot to.

PiKo · 18 Jun 2020

I believe I had a similar issue long time ago. In easyBCD I unchecked Metro ....
Then selection of the OS takes place before starting up the main OS.

NavyLCDR · 18 Jun 2020

PiKo said:

I believe I had a similar issue long time ago. In easyBCD I unchecked Metro ....
Then selection of the OS takes place before starting up the main OS.

Which is what the bcdboot command does. Kills the Metro bootloader which is causing the problem.

frozensun · 19 Jun 2020

NavyLCDR said:

In Windows 7, open a command prompt with administrator privileges and run:
bcdboot C:\Windows

yes,that did it.thx so much.

NavyLCDR · 20 Jun 2020

frozensun said:

yes,that did it.thx so much.

No problem, glad it worked for you!