Perhaps this could be stickied so it might get the attention of some of the noobs out there... DO NOT DELETE IOS!!! No matter what anyone tells you, never delete an IOS (with the exception of 222/223/249/250 if system menu has not been modified to use them). All IOS can be overwritten with a NUS update. Deleting IOS will result in a brick if you do not know exactly what you are doing! There have been way too many threads posted lately concerning noobs who deleted all of their IOS and are left with nothing to repair their systems with. DO NOT DELETE IOS!!! ***EDIT 1*** Edited to reflect WiiPower's point about deleting IOS249.