Bootable USB/DVD, not formatting Windows 10

[adilecetinkaya]

Hello, I made USB and DVD bootable for formatting my laptop. I tried different booting application. In BIOS in the BOOT section I made USB/DVD first to start from them. Then I saved and exit. And PC just opens normally. Like I didn't do something?

 

[webworkings]

Are you sure that the USB you are trying to boot from has the OS installed correctly on it?

 

[adilecetinkaya]

Are you sure that the USB you are trying to boot from has the OS installed correctly on it?

I tried it in another PC, it worked perfectly.

 

[webworkings]

Are you actually trying to format the laptops drive (erase all and leave it blank) or are you trying to restore it/change OS?