Adding a Win7 OS to a Win10 computer (multiboot)

Hello,
I wanted to install a 2nd Windows Os (Win7) on my Laptop, on a new
part.

I can boot on installing Usb stick for installation.
But after firt reboot, when I choose Win7 (new system), computer tell
me that there is something wrong on boot system.
I can still only boot on "old" Win7 part.
Is this mean that I can't install an "old OS" after a newer ?
So How can I install a Win7 alternative OS ?
Thanks

On 11/10/2015 09:38 PM, g.bon2 wrote:
Hello,
I wanted to install a 2nd Windows Os (Win7) on my Laptop, on a new part.

What would you expect to do with an older OS

I'm not sure if I see the point


I can boot on installing Usb stick for installation.
But after firt reboot, when I choose Win7 (new system), computer tell me
that there is something wrong on boot system.
I can still only boot on "old" Win7 part.
Is this mean that I can't install an "old OS" after a newer ?
So How can I install a Win7 alternative OS ?
Thanks

What would you expect to do with an older OS

I'm not sure if I see the point
Just for testing an old software that can not be run within Win10

On Wed, 11 Nov 2015 04:38:49 +0100, g.bon2 wrote:

Hello,
I wanted to install a 2nd Windows Os (Win7) on my Laptop, on a new
part.

I can boot on installing Usb stick for installation.
But after firt reboot, when I choose Win7 (new system), computer tell
me that there is something wrong on boot system.
I can still only boot on "old" Win7 part.
Is this mean that I can't install an "old OS" after a newer ?
So How can I install a Win7 alternative OS ?
Thanks

Try using:
https://neosmart.net/EasyBCD/

On 11/11/2015 11:24, mechanic wrote:
On Wed, 11 Nov 2015 04:38:49 +0100, g.bon2 wrote:

Hello,
I wanted to install a 2nd Windows Os (Win7) on my Laptop, on a new
part.

I can boot on installing Usb stick for installation.
But after firt reboot, when I choose Win7 (new system), computer tell
me that there is something wrong on boot system.
I can still only boot on "old" Win7 part.
Is this mean that I can't install an "old OS" after a newer ?
So How can I install a Win7 alternative OS ?
Thanks

Try using:
https://neosmart.net/EasyBCD/


I used to use EasyBCD years ago when dual booting between WinXP and Win95.

On 11/11/2015 02:38 AM, g.bon2 wrote:
What would you expect to do with an older OS

I'm not sure if I see the point
Just for testing an old software that can not be run within Win10






Then you have several choices because if you would have gotten Win7 to
install you probably would have wiped out your Win10 boot loader.


1)Third party boot manager

2)Disconnect the hard drive and install a 2nd one for Win7. Reconnect
the original drive and select the drive you want in the BIOS boot drive
selector

3) Install Win7 in a virtual machine

g.bon2 wrote:
Hello,
I wanted to install a 2nd Windows Os (Win7) on my Laptop, on a new part.

I can boot on installing Usb stick for installation.
But after firt reboot, when I choose Win7 (new system), computer tell me
that there is something wrong on boot system.
I can still only boot on "old" Win7 part.
Is this mean that I can't install an "old OS" after a newer ?
So How can I install a Win7 alternative OS ?
Thanks

You would:

1) Backup the drive first, just in case. VERY IMPORTANT.

2) Create an NTFS partition for the Win7 install. You can't
install without some space for it. Planning the setup is
better than Windows making a mess...
3) Install Win7 into that partition with a custom install.
And hope that the Win7 installer notes the partition with the
Active flag and /boot folder in it, to place the BCD file.
4) The claim here

http://superuser.com/questions/51158...-installations

bcdboot f:\windows

If you're booted into Windows 10, you could open an
Administrator Command Prompt, check the drive letters,
verify that F: contains the other Windows OS, and add it
to the menu in that way.

Now, type

bcdedit

which is equivalent to "bcdedit /enum" to see the new BCD contents.

You can change the OS description in the boot menu.
Each BCD entry has an identifier, such as {current} or {default}.
You need to use the right identifier in a command, so the
command is applied to the correct boot menu entry.

bcdedit /set {current} description "Windows 7 (Partition 1)"

5) Since you made a backup in step 1, and also have your emergency boot
CD available to restore the original OS, if any of this fails
to work correctly, you're ready to try again.

Why do it this way ? It's more fun.

HTH,
Paul

g.bon2 wrote on 11/10/2015 10:38 PM:
Hello,
I wanted to install a 2nd Windows Os (Win7) on my Laptop, on a new part.

I can boot on installing Usb stick for installation.
But after firt reboot, when I choose Win7 (new system), computer tell me that there is something wrong on boot system.
I can still only boot on "old" Win7 part.
Is this mean that I can't install an "old OS" after a newer ?
So How can I install a Win7 alternative OS ?
Thanks

When all else fails, I find it easier to load the oldest OS first and then progress onward.
I had Win7 and upgraded to Win10. I wanted winXP for a legacy scanner and tried my best to get it working. I have to
admit, I was stubborn and did not want EasyBCD etc.

Finally just loaded XP on a clean drive partitioned in 2 pieces. Then loaded 10 on the 2nd partition. 10's boot menu
pops up now and I can choose xp or 10. Set the timeout to 3 seconds and it boots to win 10 by default and fast.

But that means a clean install of everything. Not the best answer by it worked for me.