After installing Windows 7 in my Windows 10 laptop it won't boot (Error that says that the hardware or software was changed)

[lt24]

I had a laptop that was pretty slow.
I changed the boot from UEFI to Legacy and booted from a USB.
I installed Win 7 in my laptop, it had a lot of partitions and I deleted all of them.
After I installed Win 7 I tried to boot and the Win 7 boot animation got stuck and therefore it showed a menu that said (The menu was in Spanish because that is my main language and this is a translation): Windows can't boot. There was a change in hardware or software, to solve this:
1. Insert the Windows installation disc.
2. Select your language and press continue.
3. Click the system repair option.

I did this but I shows a lot of options and I don't know what to do.

 

[hang-the-9]

What is your exact laptop model? Some of the newer systems do not handle Windows 7 well. We have a bunch at work we need to run Win 10 on.

 

[jaguarskx]

Unfortunately, Windows 7 is no longer supported on laptops / desktop with modern CPUs beginning with Intel's 7th generation "Kaby lake" CPUs (the i5-7200u is an example), and AMD's Ryzen APUs / CPUs.