How can I fix Unfortunately, System UI has stopped.?

A

AC Question

Unfortunately, System UI has stopped.

I used ROM Manager to backup but something went wrong. I did go to sys recovery i deleted cache bu when i reboot after SAMSUNG's logo appears the error message. My background is black now, home button do't work and ther is no falling menu no bateri charge. I can open google chrome i can play with any app but when i open settings its another error message. Please help im stuck from 5 hours now
 

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