Windows 10: Dual booting with 2 seperate hard drives

Hi, have hp laptop in which I have installed seperately 2 hard drive which runs Windows 10 Proff. And Windows 7 Proff. These have to be installed to the same bay, independently, when they will be recognised. Recently I obtained another dvd drive bay in which I installed the second hard drive which runs Windows 7I have not tried to see if the bios will recognise them this options, do not want to loose the boot partitions, will the bios recognise the hard drives as drive C and drive E or drive D which the dvd drive will have been previously and will be again when I swap the dvd drive back, A lot long-winded question for someone to help and advise about. I previously have lost the boot sections of hard drives and I do not want to loose any on these drives. Thanks Dave

:)

 

What is the best way to remove Windows 10 from my dual boot before 7/29

At this time I am do booting Windows 8.1 and Windows 10. 8 .1 is on an SSD and 10 has its own mechanical hard drive. I want to remove Windows 10 from the mechanical hard drive so I don't end up dual booting into 2 copies of Windows 10. My Windows 8 installation
already has the Windows 10 upgrade flag. Any suggestions. Which hard drive holds the dual-boot "application"?1 thing that

 

Need help with dual boot 2 hard drives & Win 10

Thanks Rose,

Apologies for the long break between your response and my answer, but I've been caught up here.

Ok, instead of using the media card I already had with the Win 10 OS on it, I used your link and created a fresh DVD Win 10 ISO.

I did all the things you've recommended and my GAMES OS/hdd would only get to a black screen with a cursor, but it would show both monitors working and I could move the cursor between both (I run 2 monitors), but it stalled there and nothing more would happen.

I then restarted, reconnected and booted from my other Win 10 drive/operating system and from there did a full format of my problem GAMES drive.

Because I'm running a <F12> Boot Menu and want to continue doing something like this, I left the 'Boot Menu' in the loop, but powered down and disconnected the good hdd and reconnected and restarted and installed a fresh Win 10 from the ISO onto the GAMES HDD.

All good so far and up came a fresh Win 10 and I then installed all the Win updates, but... even with this drive running as the only primary hdd (at the moment) with Win 10, upon restart this drive (via the 'Boot Menu') then says ... 'Disk Boot Failure,
Insert System Disk and Press Enter'!

I inserted the Win 10 ISO and my HDD then booted correctly, but will not boot now without the system ISO loading first!

So, I then tried to do your recommendations again (now that I've definitely got a working system albeit not quite correctly) only to now find that not only would the hdd still not boot, but after inserting the Win ISO, it wants to load a new operating system!

If I then restart and choose to boot from the ISO disk instead and not the GAMES hdd, I can then choose to repair, which it doesn't/or for some reason can't, so the only option left was to (thankfully) roll back to a previous instance of Win which was just
before I had downloaded all the new OS updates!

Then I could restart the PC, choose boot from the hdd and even thought I still got the 'Disk Boot Failure, Insert System Disk and Press Enter', on inserting the ISO, it at least didn't want to fix or install a fresh OS and instead finally booted to the OS
on the HDD!

So, I'm back to the beginning minus all my files I originally lost/wiped on the first of 3 Win 10 installs, but at least we know how it goes now.

So, is there some problem with using Win 10 with a Boot Menu, or is it something as simple as suggested by someone that the 2 drives have to be in a particular order with their SATA connections?

Either way, this NEVER happened or looked like a problem with Win 7 and if this can't be resolved soon, I'm really thinking of going back to Win 7 to stop all this time wasting and angst.

Your help here would be appreciated.

Thanks

 

What ever drive the o/s boots from normally become c even if when booting from another drive its d or e are you going to boot by changing the boot order in the bios?

 

BIOS does not assign drives letters. The OS assigns drive letters when the OS loads based on the GUIDs assigned to the drives - which is stored on the drives themselves and does not come from BIOS either. You won't be changing the GUIDs of the drives, therefore when the OS loads, it won't change the drive letters from what they were previously either.