Won't boot to Windows 7 with other drive installed

[Thornax22]

I just got a new WD Blue drive to run alongside my WD Green. I installed Linux Mint to the WD Green because Windows 7 broke everything a while ago. I installed Windows 7 on my new drive, and it boots to Windows and works just fine with only the WD Blue plugged in.

But as soon as I plug in the WD Green, it tries to start Windows 7 on the other drive, (as it should,) but always ends up with the error "Reboot and select a proper boot device." When I unplug the Linux drive, (the WD Green,) so that there's only one drive, then the WD Blue drive boots to Windows no problem.

Why does it not like it when the other drive is plugged in?

 

[tejayd]

Boot order in your bios?

 

[slingsrat]

Does the WD green have a boot sector on it with an entry pointing to your old Windows 7 installation? You can use easyBCD to check out these things and fix things up.

 

[Thornax22]

Does the WD green have a boot sector on it with an entry pointing to your old Windows 7 installation? You can use easyBCD to check out these things are fix things up.

That's an interesting idea. Didn't think of that at all. I'll try it.

 

[Thornax22]

Boot order in your bios?

No, boot order is correct. I've tried every possible boot device. "Windows Boot Manager," "UEFI: Windows Boot Manager," "UEFI: WD-WD10," all of it.