Windows Vista dualboot

[ReXoLr]

i have windows 7 x64 bit, and i really want to dual boot it with windows vista, but i keep getting a error, i tried different iso's different usb sticks no matter what i do i always get that error and i dont know how to fix it, i was using windows vista ultimate iso's, i would appreciate any help.
Also i am very sorry for the blackness on the camera it is because the lens are cracked. https://ibb.co/b2tf2W4

 

Edited April 18, 2021 by ReXoLr

[winvispixp]

You are supposed to install the older OS first (vista)

Make sure you install it on a MBR partitioned drive

what are your pc specs?

[ReXoLr]

my pc specs are here:
 

B75M-D3H, GTX strix 960 2gb, Intel core i5 3330 8gb of ram and windows 7 ultimate

Edited April 19, 2021 by ReXoLr

[ReXoLr]

this problem is solved, i installed windows vista and then 7 and also thanks for the info on dualbooting.