Okay, I see you want linux on your PC. If you're running Windows, download L.I.L.I or LILU, it's an app that'll make a Live, Persistence Mode 0ff/On USB bootable disk, stick, pen, pencil ladida.
http://www.linuxliveusb.com/Now, after install of this app, it'll periodically look up for new distros, but I think the better is that you download yourself the one you want.
http://distrowatch.com/Then purely run LILI and add the iso, format the usb pen drive, click the lighting and that'll be that. You have yourself a bootable linux (any distro or fork of=) drive. Now when restarting, press F12 in most cases, and pick the USB you just installed the distro too. If that's not working, for the time being (disconnect all your other USB HDDs) hit DEL when booting up and choose to boot from that exatct pen drive.
But then again, after restart, press F12 to be sure to boot from that drive.
Hope it helps.