If someone could tell me the best way to go about this, that would be great. I've done about everything I've seen online, with editing the install.wim and boot.wim, and I still get the same popup after I click on the button to install windows. I've done basically everything like I said, so I'm kinda at a standstill on what I should do to get this working. I was going to use Windows 10, but I just generally prefer to use Windows 7 over anything else. Thank you!