hang up when I turn it on

when i turn on my tab it act like it will boot up but then hangz up on initialization. i can get to the place where option to reboot or reinztall original, etc. reluctant az i have a lot of programz extra. zorry for my clumzy woring but uzing laptop with mizzing keyz to type thiz. u can zee why i am eager to get my tablet back in play!

iz there any way to back up galazy tab 10.1 after getting in thiz preictament lol alzo, when i puzh power on button an volume up button it oeznt alwayz give me the optionz; inztea itactz az if it iz trying to a ownloa an inztall of oz upgrae.