Most modern computers (including those that originally shipped with Windows 7) support a temporary . This is the preferred method because it doesn’t permanently change settings.
While rare on original Windows 7 machines, if you are installing Windows 7 on newer hardware, you must disable Secure Boot and enable Legacy Support (CSM) in the BIOS. how to boot from usb on windows 7
Select the USB drive (it may be listed as "USB-HDD" or by its brand name, like "Kingston"). has a black screen
Use this if your computer is broken, has a black screen, or if Method 1 didn't work. you’re done. If not
If your computer boots from the USB, you’re done. If not, proceed to Step 3.