I tried creating a live USB with the default Ubuntu disk creator and the Windows version of Universal-usb-installer and they both work fine except persistence doesn't seem to work.
For example, I change the background image, reboot, I selected the "try Ubuntu" option again at startup and the background is the default. Same with installed packages.
Am I doing something wrong?
Edit My computer did not came with any OS preinstalled. It's an Asus P9X79 in case it matters.