Solved Dual-Boot Windows 10 (drive D) with Windows 7 (drive c)

January 14, 2016 at 15:53:02
Specs: Windows7Pro 64bit
i would also like to have the option of starting different hard drives. either:
the current windows 7 OS on drive C;
or the new Windows 10 on drive D.

See More: Dual-Boot Windows 10 (drive D) with Windows 7 (drive c)

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January 14, 2016 at 17:21:42
"new Windows 10 on drive D"
Make sure you have C drive disconnected when you install.

After making sure both drives worked perfectly on their own, cable both up & then boot the comp.

Set the bios to boot from the drive you prefer to be default.

Toggle F8 during boot, if you want to select the non default drive.

message edited by Johnw

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January 14, 2016 at 19:58:46
Please note that all Windows OS' consider the drive they are on is C drive so that when in W10, it will be on C drive and when you are in W7 that will be C drive. To limit confusion, name both drives with a name and be consistent over both systems. You can name one drive something like 'Win10 System' and the other 'Win7 System' and another drive might be 'Storage Drive'.
The reason you disconnect one drive before installing the other OS is that they each have their own boot partition separate from the other and the system can boot with either drive installed by itself.
Another option (especially if both drives are on the same physical drive) is to partition the drives and note carefully the reported partition sizes so you will not be confused during the install, pop in the install disk, select the Custom install options and select the dual boot option and carefully select the correct drive by size to install on. Note that there is the possibility that you might install to the wrong partition and overwrite either Windows 7 or your storage drive is it is separate, so it is important to back up all personal data before you start. Note that I have not done this with Windows 10 but the option should be there as it has been previously but you might have to look carefully to find it. You can also Google 'Windows 10 dual boot install' and see what options you see as far as instructions. This should boot with Windows asking you which system you want to boot to.
The separate drive with F8 boot options is probably a safer install though.

You have to be a little bit crazy to keep you from going insane.

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January 15, 2016 at 14:21:40
✔ Best Answer
Not being familiar with windows 10 yet... I'm wondering if one could simply add win-7 to a windows 10 boot manager; or visa-versa. Both versions of windows of course being on separate drives.

One certainly could use this approach with all previous versions NT (NT through to windows 7).

With each OS already installed on its own drive, once one has added whichever Windows OS is on a second hard drive to the "first" hard drive's boot-manager, might not the dual boot option/selection be viable without the F8 routine?

Also at any time either drive could be used as a sole boot device too; as it's mbr will not have been touched in any way.

And of course one might consider something like the Easus utilty?

And this discussion might be of interest....

message edited by trvlr

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