What is system UI?

my Samsung galaxy s4 keeps coming up with a message that reads (unfortunately, System UI has stopped) how can I fix this or:my Samsung galaxy s4 keeps

my Samsung galaxy s4 keeps coming up with a message that reads (unfortunately, System UI has stopped) how can I fix this

or:my Samsung galaxy s4 keeps coming up with a message that reads (unfortunately, System UI has stopped) how can I fix this

or:It is a error when a update was corrupted. Or you device is not compatible with that program or update, So you must not be able to update it. I would look on other sites to find out how to uninstall the update. Hope this was helpful for you!

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