Do NOT select Discard on Shutdown when you copy 13.04 .ISO to a USB Stick!
Do NOT select Discard on Shutdown when you copy Ubuntu 13.04 .ISO to a USB Stick! You need to create a Persistence File in order for the Desktop Version of 13.04 .ISO to Copy to a USB Stick! This most likely applies to the 12.10 Desktop as well!
2013 Dell Inspiron 15 3521 Laptop, 2010 Dell Inspiron 1012 Mini Net Book, 2010 Dell Inspiron Zino HD 400, Sprint Samsung Galaxy S4, and Apple IPad Mini WIFI Only.