I wanted to get a clean install of Windows 7 via a USB drive/stick, but for some reason the official Windows USB/DVD Download Tool wouldn't accept the ISO I selected. So, then it's time for Unetbootin. Selected the ISO, selected my USB drive, waited for a couple of minutes and I had a working USB install drive. So I thought... I booted the USB and got into a Unetbootin boot manager, but it wouldn't go anywhere from there. So I read up about this and it turns out I had to format the USB drive in NTFS to get it to work.