1.    17 Jun 2015 #1
    Join Date : Jan 2015
    Posts : 313
    Windows 10 Home x64

    Drive letter designations after Dual Boot install

    Hi, I've installed W10 in my laptop in a dual boot configuration with W7 successfully. I used this tutorial Windows 10 - Dual Boot with Windows 7 or Windows 8 I'm setting up to do the same thing in my desktop and have a couple questions about drive letter designation after doing it. I created a 30G partition on the C drive of my desktop for the W10 install.

    My laptop has one drive, the OS "C" drive, I created a another partition for W10, after installing W10 using the USB ISO "boot from USB" instruction when I'm in W10 it shows as the C drive, and the W7 partition is inactive D drive. Just the opposite when I'm in W7, it shows as the active C partition and W10 is the inactive D partition.

    On my desktop I have the 120G C drive for W7, a 500G D drive for backups, a fixed CD-ROM E drive, and a virtual CD-ROM F drive. I've made a 30G partition on the C drive to install W10 on for the dual boot. The question is when the auto backup runs (I have it backup & image every Sunday at 7:00pm) it backs up the C drive to the D drive. Will the W10 dual boot install change my backup drive letter to something other than D, or will the non OS physical drives keep the same drive letter? I will have to remember to be in W7 for it to be the C drive when it backs up, but my concern was if the dual boot was going to change my backup drive to something other than D. That would affect the backup.

    I've attached disk mgmt. below, FYI the G drive is the USB with the W10 ISO

    Attachment 21744
    Last edited by CmmTch; 17 Jun 2015 at 18:52.
      My System SpecsSystem Spec

  2.    17 Jun 2015 #2
    Join Date : Jan 2015
    Posts : 313
    Windows 10 Home x64

    I installed W10 on the 30G partition I created on my C drive, while in W10 it shows as the C, W7 shows as D, backup drive shows as F.

    Booted into W7, C is W7, D is the backup drive, F is the W10 install, so my question was answered.

    Summary: While booted into W7 the C and D drives are the same as they were before W10 dual boot install. While booted into W10, W10 becomes the C drive, W7 is D and the backup is F. Fixed CD-ROM drive E didn't change, virtual CD-ROM is now G

    Disk management below while booted into W7, F is W10.

    Attachment 21783
      My System SpecsSystem Spec


Similar Threads
Thread Forum
Solved Reinstalling Windows 7 on 7/10 dual boot breaks dual boot
I installed the 10 tech preview along side my win 7 ultimate, I reinstalled, the Windows 7 side of the HDD because after however many years the OS had a LOT of clutter, and even though windows update was a nightmare I finally got all the updates...
Installation and Setup
VMWARE / VBOX etc - Boot VM from USB drive to install GUEST OS
Hi there Most VM programs allow you to boot from an ISO image -- useful when installing the Guest OS for the first time. Since now DVD's are going the way of the DODO isn't about time these Virtual Machine software manufacturers such as VMWARE...
Solved No boot menu on dual boot WIn8.1↔10
HIYAS I have installed Win10 on secondary partition while keeping Windows 8.1 as primary. Everything went fine, after few reboots Win 10 was ready to use. After setting up things I rebooted, In boot manager I have two entries - Windows 10 as...
Installation and Setup
DVD drive did not install but a floppy drive did (I don't have one)
Build 10130 installed fine from DVD but after install install DVD drive did not work at all. I checked device manager and there was no optical drives listed at all, nut there was a listing for a 3.5" floppy A: drive, which is not even in my rig. ...
Drivers and Hardware
Convert dual boot install to normal boot
After several weeks of testing I'm ready to go full on Windows 10 and want to get rid of Windows 7 but I have some partitioning issues I want to clean up. I currently have Windows 7 on drive 0 (360 GB) and Windows 10 on drive 1 (500 GB). Both are...
Installation and Setup
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 16:05.
Find Us
Twitter Facebook Google+

Windows 10 Forums