I currently have an HP computer that is only a few months old. The computer recently started running super slow and I was going to change from Windows 7 to Ubuntu as I know that Windows has way more viruses available than Ubuntu.
I used the Pendrivelinux software to change the ISO to USB and it said complete. I then took the USB, plugged it into my computer and at the screen that pops up before the Windows logo I pressed F12. The only thing I could choose was Windows 7.