Strange boot loop issue on factory reset but not on CM10

view story

http://forum.xda-developers.com – Hello, I have looked around the various threads (including the 'how to unbrick your prime' one) but have not seen this issue mentioned. I have a strange issue where if I factory reset (i.e. to Asus) the device will simply keep looping at the ASUS EEE logo, with device is unlocked in the top left hand corner. If however I install CM10 or another MOD, it seems to work as normal and boot into the homescren. Having read around, there was an issue with an Asus update where it appeared to do something similar to this, is it perhaps that I am on that version and thus am getting the same erro (HowTos)