The usual is a factory reset. Some systems have this documented, others you get to call the maker to ask how.
Since you omitted this info, just call it in and ask how to reset and make your warranty claim. Even out of warranty, claim "your update borked it" and I want you to fix it.
It's a 3D Blu-ray 7.1ch 5 Speakers Home Entertainment System.
System requested to updated. But all items are removed during update and
started restart the equipment continuously. So, it out of use now.
How do I have to solve this problem? Any idea?
Sefik

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