Windows 10: Dual boot Windows 10 and Win 8.1 with Win 10 installed

My situation is usually the opposite of what I've found online. I upgraded to Win 10 and I'm quite comfortable with it, the problem is that a critical application for my job does not work with this platform. As I have space, my preferred option is to dual boot with Win 10 and Win 8.1 on the system. Please guide me on how to go ahead with this endeavor.
This is quite an urgent requirement so I'd appreciate help.

:)

 

Windows Defender Will Not Start This operation returned because the timeout period expired W10

Nope - None. Started as a Clean install on a Win 8.1 partition on a dual boot (Win7/Win8) machine. Used Windows Defender on the Win 8.1 partition, Upgraded to Win 10, After the Upgrade Windows Defender stopped working.

Fixed it by copying ALL Windows Defender files in my son's win 10 machine, and dual booted my machine in to Win 7, and then copied my sons files in the Windows Defender Directory on the Win 10 partition.

Worked, But not really a portable solution.

 

Remove Dual Boot Setup "Windows 7 and Windows 8.1" Upgraged Windows 8.1 to Windows 10

Hello everyone, I have a problem;

I'm running a Dual Boot Setup "Win 7 and Win 8.1" then I proceeded to upgrade Win 8.1 to Win 10. Now my current setup is still dual boot, Windows 7 and Windows 10. I'm satisfied with Windows 10 and want to Remove, Uninstall or Delete Win 7.

Can someone help ? without me having to NUKE my system and Reinstall.

Regards,

 

Shawn has a good tutorial for this. Read carefully and give it a try. Remember to backup anything you don't want to lose. System image, personal files, etc.
Windows 10 - Dual Boot with Windows 7 or Windows 8 - Windows 10 Forums

EDIT: Please update your system specs. https://www.tenforums.com/profile.php?do=extra It's very helpful to any forum member that is trying to help. And welcome to the Forum!

 

Thanks for your quick reply. Your link references installing win 10 on a win 8 system, what I want to do is the opposite . I have win 10 installed and I need to install Win 8 as a dual boot.
Please advise.

 

If you have valid license keys, it should not be a problem. As you can see from my specs, I am triple booting 2 win 10's and 8.1. Can you post a screenshot of your Disk Management screen? It may be as simple as partitioning an area for the 8.1 install. Boot from the 8.1 install media and let it do it's thing. Need to see that screenshot first. Get back to me....

 

Do you have two valid license keys? If you do, then it should be no big hassle to accomplish what you want.

 

With all due respect, I think I just said that. No offense intended.

 

Unfortunately, I don't have a valid 8.1 license, any options?

 

I can't help you with that. Sorry.... ​Forum Rules - Windows 10 Forums 4) No piracy or discussion of piracy allowed at all. Such as software, music, videos and other intellectual property violations (e.g. downloading youtube videos locally etc).

 

Amen
How did you upgrade to 10 if you have no 8. You have a critical app for work. And need 8 to run it. We must assume that you had Windows 8 somehow before. More info is needed from you to proceed. *Biggrin

 

I had Windows 7 previously installed.

 

You will not be able to install Windows 8.1 if you do not have Windows 8/8.1 product key.

How to download and clean install Windows 8.1 -> link

 

Here you go, this might help;

Amazon.com: Microsoft Windows 8.1 64-bit - License and Media - OEM x DVD-ROM - PC - English - WN7-00615: Computers Accessories


Microsoft Windows 8.1 Pro - 64-bit - Operating Systems - Newegg.com