Windows 10 won't boot after removing a second hard drive with Windows 7 on it

pewpewboomboom

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Apr 29, 2017
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Built a computer about a week ago with 2 drives for storage. The first drive C: is a Samsung 960 EVO 250GB being used as the boot drive with all programs being installed on it so far. Second drive E: is a WD Blue 1TB from a relative with Windows 7 previously installed on it and has so far not been used. I noticed there was some important stuff that a relative forgot to back-up so I decided to remove the drive to return it. After turning off my PC and removing the E: drive, Windows 10 wouldn't boot up from the C: drive stating "Reboot and select proper boot device". After placing the E: drive back into the PC, it booted up perfectly fine right into Windows 10.

https://s2.postimg.org/fu4o5ja6h/2017-08-06.png

I'm guessing the issue is somehow related to the "System Reserved" portion being connected to the E: drive as shown in the screenshot.
 

gardenman

Admirable
Herald
You installed Windows on your SSD *while* your HDD was hooked up? It's a common mistake. For some reason Windows will often put the System Reserved partition on the HDD (or use the one already there). It probably has something to do with boot order in BIOS.

I recommend a full system backup before doing anything below.

This page is dated but seems to fit your problem and has a solution:
https://www.sevenforums.com/tutorials/209885-bootmgr-move-c-easybcd.html
I hope the information on it is still valid. You may have to change the boot order in BIOS afterwards.

Maybe this can help, read SkyNetRising's answer here: http://www.tomshardware.com/forum/id-3482884/windows-boot-hdd-ssd.html That answer is for Win 10.

Another option is to reinstall Windows on the SSD *after* the HDD is removed.

I've never had to do this. I can't really help you with this any further but I thought I'd give you that info. Remember to backup everything before trying any of the above. Good luck.

If you think those won't help, then reply back.
 

pewpewboomboom

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Apr 29, 2017
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Both ideas didn't seem to work, so I'll just stick with the tried and true method of reinstalling Windows. Thank you for your help!

 

gardenman

Admirable
Herald
Did you try EasyBCD? I just tried the link on that first page and noticed it asked for a login/password. I should have tested that first. That is just an old outdated link. You can download EasyBCD from here: http://neosmart.net/EasyBCD/ There is a free version.

If you haven't re-installed yet it might be worth a try. I hope you get it fixed up, I'm sorry I couldn't help more.
 

pewpewboomboom

Prominent
Apr 29, 2017
6
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I think I had a brainfart when I was typing my reply. I only tried the second option because of the username requirement. I ended up reinstalling Windows since it was easy and quick (960 Evos rule). Thank you for your help regardless!

 

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