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Windows 7: struggling to boot back to windows 8.1 after installing windows 7

16 Aug 2014   #1

windows 7 ultimate x32, windows 8.1 pro x32
struggling to boot back to windows 8.1 after installing windows 7

Hi. i need some help. i recently installed windows 7 ultimate on a new partition after having installed windows 8.1 pro. Now, after windows 7 is up and running, i cant find a way to boot back to windows 8.1. i checked msconfig and there is only windows 7 ultimate there and i checked under advanced settings in the system setting in control panel but it is not their either. i also tried using easybcd to check and create a new option that is linked to the drive where windows 8 is installed, but when i boot up and choose the windows 8.1 option, it gives me a 0xc0000428 error. can someone help please?


p.s my windows 8.1 drive was the C drive, but after i installed windows 7, that changed to the C drive and now my windows 8.1 drive is the D drive for some reason
My System SpecsSystem Spec

My System SpecsSystem Spec
16 Aug 2014   #2

Windows 7 Ultimate 64-bit, Windows 8.1 64-bit, Mac OS X 10.10, Linux Mint 17, Windows 10 Pro TP

Usually dual-booting two [or more] Operating Systems requires a boot menu of some type at startup where the choice of OS to use is made.

Due to differences in the various versions of Windows it's frequently recommended to install the older version first.

Are the C: and D: drives 2 actual drives or partitions on one drive?

As for the msconfig issue, Win8.1 can't show, the 2 OSes don't know about each other, that's a lot of what dual-booting is about. And yes, I have dual-booted in the past but find it much simpler to use a 4-port KVM and choose the version/computer I want to use, either WinVista, Win7, Win8.1 or Linux Mint 17.
My System SpecsSystem Spec
16 Aug 2014   #3

Windows 10 Pro X64

Give EasyBCD a try. It should be able to setup so you can boot Win 7 or 8. Download EasyBCD Community Edition
My System SpecsSystem Spec

16 Aug 2014   #4

Windows 10 Pro X64

Also, boot the Windows 8 install media and do a Startup repair up to 3 times, that may fix it too.
My System SpecsSystem Spec
16 Aug 2014   #5

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64

At an admin command prompt:

bcdboot d:\windows
My System SpecsSystem Spec
16 Aug 2014   #6

windows 7 ultimate x32, windows 8.1 pro x32

Thanks for the help guys. I used my windows 7 installation disk I run startup recovery and it managed to recover both my windows 7 os and my windows 8.1 os so now when I startup I get to choose which one to start with. Thanks a lot guys.
My System SpecsSystem Spec
17 Aug 2014   #7


That should have been configured when you installed 7 but it took extra repair to sort it.

Can we see a screenshot of Disk Management - Post a Screen Capture Image
My System SpecsSystem Spec

 struggling to boot back to windows 8.1 after installing windows 7

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