Dual Boot Windows 10 with Windows 7 or Windows 8  

Brink said:

I guess so. My dual boot setups with W7/W10 and W8.1.1/W10 still show C: for whatever I started up in. I suppose as long as both OSs are running fine, I wouldn't worry to much about it.

A few questions to see if anyone else with the same may also see this.



What other OS are you dual booting with?

Did you install W10 on a separate hard drive or on another partition with the other OS?

Are you using UEFI?

I'm dual booting with 7 on same drive separate partition. Even though it's on the slower half of the drive, I've had no problems. Shrunk the original 500gb in half and used the un-allocated space for 10. One note on dual boot... Win 7 (or any other earlier version of Windows) will "eat" the restore points on Win 10 OS. To avoid this make the following reg changes:

Windows 7 side:


HKLM\SYSTEM\MountedDevices\Offline \DosDevices\W: REG_DWORD 0x00000001 (1)


Windows 10 side:


HKLM\SYSTEM\MountedDevices\Offline \DosDevices\E: REG_DWORD 0x00000001 (1)

The drive letters may vary, but this is my setup.

Only the Win 7 side is really necessary, but I wanted to avoid ANY co-mingling!

I also use a folder on an external USB drive to pass files, progs, etc. back and forth. Gave it a cute name Win7_Win10_Tunnel.



F14tomcat.....

Tews said:

Hey Greg, Good to see you. We will need your expertiese to keep all of the newbs in line!!

Newbs, heck! We need him to keep us "wannabe gurus" in line!

Is there a way to delete the dual boot configuration once the Tech Preview expires?

W10 (9926) x64 is Dual boot on a win 7 x64 partition here installed with ISO DVD install was smooth runs reasonably well (pretty fast also ) only mis behaves occasionally but can be persistent when it does. I am using for daily driver now with Chrome x64 as default browser.

Seems to me IE11 (specific to this build) is very fast but unstable now and then and page reliability could be better ...no matter I always use Chrome as default anyway . F/F runs decent on W10 also . ..... I think they fixed the restore point thing since OCT build .

Hello all!

Thanks for the great tutorial! I have a follow-up question for the gurus here (I promise I tried to piece it together from comments first but either missed it or it wasn't stated). I'm trying to dual boot on a Win 8.1 laptop (with UEFI) that has only 1 drive. i've partitioned the C drive (carved off 100GB) and made bios changes (enable legacy support, disable safe boot). Attempting to install from USB I get the error about not being able to install because the disk is GPT. My biggest concern is when going through the tutorial at step 10, it tells you to delete all partitions until you only have the install partition left. I'm pretty sure I know this but want to confirm, if I do that, will it not delete my Win8.1 install? I'd really like to keep my existing install so any advice is appreciated. (this really makes me long for the days of MBR and just manually updating a couple of things to add it to the boot list!).

Thanks in advance!
-Kevin