Windows 10: How set up dual boot with two version of Windows 10

I've seen this before in Windows 10 dual boot on MBR disk. I think everything is OK; the last installed Windows got its system partition marked active, boot and page file move to system partition used at the moment.

I would be pleased both installations are bootable and wouldn't think it any more.

 

Are you telling me to set my old OS as Inactive? If so, why?

 

No , not now, not after seeing your new DM shot, leave everything as it is, it`s perfect *Smile

The only thing I see wrong now is your Data disk is marked Active, if that`s an internal disk, it should not be marked Active.

And for some reason, your System Reserved partition has a letter again.

 

But the clean install looks perfect, perfect to me anyway, now you`ll be able to delete the system reserved partition AND your old install, and your NEW install will still boot fine.

 

I agree and rep given!!

 

No, that pic of Partition Wizard was just an example, my C partition is marked active, so naturally the drop down menu will show Mark Inactive

 

I note that the System Reserved partition only has a letter assigned to it when I look at my DM from the Clean Install partition. I didn't put it there - Windows must have a reason to place it there. Until I know the reason, I would hesitate removing that partition.

Also, I assume that, to remove the old W10 OS, all I have to do is format that partition? Doesn't the MBR have to be changed also? Or is this accomplished by Windows?

Note that I removed 'Active' from the Data drive.

 

You can delete the old install AND the system reserved partition whenever you want to.

You can leave the SR letter if you want, but it is not suppose to have a letter, if it has a letter, data could mistakenly be written there.

Now you can start working on your new install, programs, drivers, etc

 

I thank you all very, very much. Not only do I have the dual boot of Windows 10, I've learned quite a bit from you folks. The only question in my mind now is that letter that was assigned to my System Reserve Partition. I don't want data to be mistakenly written there. Suppose I just delete that letter 'G?'

 

Yes, go into Disk Management and remove the letter.

And after that could you post a pic of Disk Management after booting into the old install, before you leave us *Smile I want to see something.

 

As requested: What do you think?

 

That`s beautiful, and you marked Disk 1 inactive, good job *Biggrin