How do I uninstall google on my Samsung galaxy tab 3 then reinstall, due to an error

[AC Question]

Tablet is frozen. Just keeps flashing message to uninstall google and reinstall it.

 

[Rukbat]

Most of the phone is Google - is it telling you which Google app to reinstall? If not, it's a Samsung, so reflashing the ROM is boring, not difficult - see [Samsung] How to flash Stock ROM via ODIN. (If you don't have your data backed up, you'll lose it, which is why it should all be backed up always.)