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Windows 7: Reinstall of Win 7 cannot dual boot with Win 8.1 anymore

26 Jan 2014   #1
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 
Reinstall of Win 7 cannot dual boot with Win 8.1 anymore

Hi guys,

I know I'm probably just doing something stupid, but I recently had to reinstall Windows 7 in my dual boot system. Windows 8.1 can no longer "see" Win 7 and won't dual boot with it. I tried EasyBCD and all it did was corrupt Win 8.1's Bootmgr to the point where I had to use Automatic Repair from the Win 8 install disk to get 8.1 to boot again.

Short of reinstalling Win 8, is there anything I can do from Win 7 that will re-enable dual boot? Or is there a way in Win 8? I tried a couple of the Win 8 tutorials, but the option for Win 7 never came up in the boot options screens.

Any ideas gratefully received.


My System SpecsSystem Spec
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26 Jan 2014   #2
theog

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

My System SpecsSystem Spec
27 Jan 2014   #3
gregrocker

 

I have been able to add Win7 from Win8 using Easy before. Were you using the latest version and deleted any extant entry for Win7 first before adding a new one?

If that doesn't work then you can try starting Win7 to add Win8 with EasyBCD which may work better.

To start Win7 Mark 7 Partition Active , then run Startup Repair - Run 3 Separate Times
until Seven boots and holds the System Active Boot flags.

Then if necessary install EasyBCD to Win7 to add Win8.
My System SpecsSystem Spec
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27 Jan 2014   #4
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 

Quote   Quote: Originally Posted by theog View Post
I'm sort of afraid to do that 'cause I might muck up my Seven installation...

Quote   Quote: Originally Posted by gregrocker View Post
I have been able to add Win7 from Win8 using Easy before. Were you using the latest version and deleted any extant entry for Win7 first before adding a new one?

If that doesn't work then you can try starting Win7 to add Win8 with EasyBCD which may work better.

To start Win7 Mark 7 Partition Active , then run Startup Repair - Run 3 Separate Times
until Seven boots and holds the System Active Boot flags.

Then if necessary install EasyBCD to Win7 to add Win8.
I was using Easy version 2.2, I believe. It's the last free version. I had installed it to Win 7 and tried to add Win 8. That's when things went wrong and Win 8 didn't work anymore.
My System SpecsSystem Spec
27 Jan 2014   #5
gregrocker

 

EasyBCD supports Windows 8.1: https://neosmart.net/wiki/easybcd/su...ating-systems/

I would set a Restore Point, install it and add Win7 to a Dual Boot.

You may want to first back up a System Image of Win8, but Automatic Repair should work again in the worst case.

You can also run Win8 Refresh or Win7 Repair Install, but Easy is Easier.
My System SpecsSystem Spec
27 Jan 2014   #6
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 

I'll give that a try, Greg. Thanks. I'll let you know how it goes.
My System SpecsSystem Spec
27 Jan 2014   #7
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 

Thanks Greg, it worked. Weird thing is when it starts Win 7, I get the old Vista caterpillar crawler, not the flying colors.

That's OK, I'll take it. It works at least and I don't have to fiddle with the BIOS to get it to load.
My System SpecsSystem Spec
27 Jan 2014   #8
gregrocker

 

The only fix for that I've found that will sometimes work besides reinstall is this one:

Windows Vista Boot Animation

Create a System Restore Point first.
My System SpecsSystem Spec
27 Jan 2014   #9
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 

Tried it. No go. That's alright, I can live with the Vista animation. At least it works.
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 Reinstall of Win 7 cannot dual boot with Win 8.1 anymore




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