Trying to dual boot windows 7 and windows 8

[oceanus99]

My Toshiba laptop came preinstalled with windows 8. I am trying to dual boot windows 7 onto it. I followed the following guide to partition space for windows 7:

How to Dual Boot Pre installed Windows 8 with Windows 7

I partitioned 100 GB. Then, I burned windows 7 Ultimate ISO image onto a flash drive. I tried to boot from USB by changing going into UEFI and turning off safe boot, turning on legacy mode, changing the boot order to USB first. No success. Now, I just copied all the files created from burning the ISO straight into the partition I created. From there, I click setup.exe. The windows install window comes up correctly, but when I click install, I get this error: imgur: the simple image sharer

Why am I getting the error when there is 100 GB of space?

 

[carnageX]

Because you can't run the setup from the same partition you're trying to install to.

What tool did you use to put the ISO onto the flashdrive? Did you use Microsoft's USB tool? Microsoft Store