Been using Windows 10 fine for months, now it randomly reverts back to Windows 7 upon rebooting.

[darkoftitan]

Hello. I have been using Windows 10 Pro for a good number of months now, and have had no problem with it up until last week or so. Now, whenever I reboot my computer for updates or whatnot, it will revert back to Windows 7 instead of Windows 10. Win 10 is on my SSD, and Win 7 is on my old HD that I used for storage. My boot priority in the BIOS has always been the SSD, however now, when I check the BIOS after a Win 7 boot, the only item in the Boot Priority list is the old HD, and the SSD isn't even there. If I dig around in the BIOS, I can find the Boot Menu, where my SSD is still listed, and when I click on that, it will boot back up in to Windows 10, usually until I have to reboot again.

This one has me stumped, and any help would be appreciated. Thank you for your time!

 

[basroil]

It's very easy, boot into Win 10 once, then go and delete Windows 7 from the old drive and remove the boot partition from the HDD.

 

[darkoftitan]

It's very easy, boot into Win 10 once, then go and delete Windows 7 from the old drive and remove the boot partition from the HDD.

I actually was going to try that, but I was afraid that since the SSD wasn't even showing up in the main Boot Priority List, that if it tried to reboot in Windows 7 again, but nothing was there.. Well, i wasn't sure what was going to happen. Do you think the SSD not being in the boot priority will be a problem? If not, i will definitely try that.

 

[basroil]

It's very easy, boot into Win 10 once, then go and delete Windows 7 from the old drive and remove the boot partition from the HDD.

I actually was going to try that, but I was afraid that since the SSD wasn't even showing up in the main Boot Priority List, that if it tried to reboot in Windows 7 again, but nothing was there.. Well, i wasn't sure what was going to happen. Do you think the SSD not being in the boot priority will be a problem? If not, i will definitely try that.

Most newer (UEFI) motherboards won't show the C drive and instead just the Windows boot loader, so it shouldn't be an issue if the system properly boots.

 

[darkoftitan]

It's very easy, boot into Win 10 once, then go and delete Windows 7 from the old drive and remove the boot partition from the HDD.

Hello again, I just wanted to be clear on this before I do it. When you say delete Windows 7 from the old drive, you mean straight up highlight the folder and press Delete, right? No un-install process? And is the boot partition also going to show up in windows explorer, or am I way off the mark there?

 

[basroil]

It's very easy, boot into Win 10 once, then go and delete Windows 7 from the old drive and remove the boot partition from the HDD.

Hello again, I just wanted to be clear on this before I do it. When you say delete Windows 7 from the old drive, you mean straight up highlight the folder and press Delete, right? No un-install process? And is the boot partition also going to show up in windows explorer, or am I way off the mark there?

Way off. The boot partition will show up in the disk manager , but you need to be careful. Delete ONLY the one on the old disk (there should be two, one on each disk), or risk having to reinstall windows.

You also can't uninstall an OS, so you need to just delete the Windows folder in the old drive (and probably programdata/old program files if you reinstalled to C)

 

[darkoftitan]

It's very easy, boot into Win 10 once, then go and delete Windows 7 from the old drive and remove the boot partition from the HDD.

Hello again, I just wanted to be clear on this before I do it. When you say delete Windows 7 from the old drive, you mean straight up highlight the folder and press Delete, right? No un-install process? And is the boot partition also going to show up in windows explorer, or am I way off the mark there?

Way off. The boot partition will show up in the disk manager , but you need to be careful. Delete ONLY the one on the old disk (there should be two, one on each disk), or risk having to reinstall windows.

You also can't uninstall an OS, so you need to just delete the Windows folder in the old drive (and probably programdata/old program files if you reinstalled to C)

Ok, I found the Disk Management. Hopefully this link works for the screenshot I took. http://imgur.com/sQq0K1w

Disk 0 is the HDD from my old computer, which I stuck in here to see what I still had on it, and it ran windows 7. I didn't have this Windows 10 problem until well after I did that though. Now that I think about it, that might be the one I am looking for..

Disk 1 is the 2 TB i put in when I built the computer. It was only supposed to be storage space, and now that I am thinking about it, I don't recall ever putting Windows on it. I can't believe my memory blanked that much. I blame old age. XD

Disk 2 is the SSD I put in that originally had Windows 7 on it, but I ended up installing Windows 10 on it and never looked back. Every now and then it does ask me which version of Windows I would like to start, but more often than not it defaults to the Windows 10 I wanted anyways.

I checked my C drive in Windows Explorer, and I only see a Windows folder there. No more Windows.old, which I assume was my old Windows 7. Am I correct in assuming that the 10GB partition on Disk 0, (H: ) is the one I need to remove?

 

[basroil]

Your setup is pretty messed up. You need to fix everything.
1) Connect your primary drive to the SATA 0_0 (or 1_0 if there's no 0_0), not necessary but far easier to keep track of what you're booting from
2) Remove the 39MB OEM partition and recovery on what is now disk 0
3) Make sure NOT to remove the system reserved partition in disk 2

The easiest way though is to move everything (files) from your disk 0 to disk 1 and then wipe disk 0, without copying only necessary files