Installing system update keeps flashing during the safe boo..boot up process after I just backed everything up and did a factory reset...umm, its been flashing tht with the android above the words for abt half an hour now....is this normal?.. haven't did a factory reset in a while.......and it's still going.......and going....and I took the battery out twice during this long process too............ and it's still goin... and going