Windows 10: Dual Boot Windows 7 And 10

I have been running Windows 7 on a Dell OptiPlex 960. The 960 has 2 hard drives. I made a system image, (Macrium) of drive C, (Windows 7) I then installed that image on the second hard drive (F). I unplugged the first hard drive, (C) and booted into second drive, (F), fired up Windows 7, and did upgrade to Windows 10. Upgrade went as it should. Can run Windows 10 on (F) with no problems. Now I reconnect hard drive (C) . Fire up the 960, go to bios and select (F) drive. Windows 10. No go. Screen says there is a problem, and Windows 10 does not load. However, if I fire up the 960, and go to bios, and select (C) drive Windows 7 starts. So why won't Windows 10 on second hard drive work?

:)

 

Dual Boot Change from Windows 8.1 & 7 to Windows 10 & 7

I have a dual boot Windows 8.1 and Windows 7.

(1) Is it possible to have a triple boot Windows 10, Windows 8.1 and Windows 7?

(2) If not, can I just upgrade the Windows 8.1 to Windows 10 to have a dual boot Windows 10 and Windows 7? Or do I have to do the normal dual boot set-up?

 

How do I restore dual boot capability after Windows 10 clean install removed it

My computer was dual-boot with Windows 7 boot partitions on two separate drives. After upgrading to Windows 10, the dual boot provision worked fine. However after a clean install of Windows 10, dual-boot capability is no longer available. The boot partition
for the remaining Windows 7 syBistem is intact. Only the dual boot option is gone.

I tried the changing the default operating system under System Properties/Advanced/Startup and Recovery, but the only choice is Windows 10. Windows 7 isn't a option. I'm guessing that the clean Windows 10 install wiped out access to the dual-boot menu.

Thanks.

Bill

 

Since what you are wanting to do violates the End Users License Agreement for Windows, we can't really help you here at Tenforums because it violates the forum rules.

 

Did not know that.

 

I was going to suggest virtualization, instead of dual-booting, but that also would require two licenses in your case. That's the deal with the free upgrade, is that it replaces the license for the previous OS. So, buy doing the upgrade process, you invalidated your Windows 7 license.

Most of us have ended up doing a clean install of 10 once the upgrade process has finished and activated. Sounds like this might be a great time to do so.