UNKNOWN NAMES APPEARING IN THE SECTION 'SHARING' TOPIC @ WINDOW LEFT

I STARTED SEEING NAMES APPEARING UNDER THE HEADING IN THE LEFT COLUMN IN ANY WINDOW, I OPENED "SHARED." I HAVE A MAC MINI (END OF 2012), ROUTER NETGEAR, APPLE TV, BURNING AND A HP PRINTER 3 IN 1, USED FOR SCANNING. THE LAST THREE ITEMS ARE CONNECTED WIRELESSLY WITH THE ROUTER.

THE NAMES THAT APPEAR ARE:

EXPENDIA-PC

SECCHA-PC

TIBERRIUS-PC

I CAN'T FIND ANYWHERE THAT I CAN BLOCK OR DELETE THESE UNKNOWN ELEMENTS. THEY HAVE A MAC ADDRESS AND AN IP ADDRESS... BUT I COULD NOT FIND INFORMATION USEFUL YET. WHEN I CLICK ON THE NAMES, EACH OF THEM OPENS ANOTHER WINDOW, SAYS 'WINDOWS PC' WITH COMPUTER ART.

ALL SAY NOT 'CONNECTED', BUT I'M A LITTLE PARANOID ON THE QUESTION OF WHETHER SOMEONE COULD TRY TO HACK INTO MY COMPUTER.

I know... I'M DENSE INTERNET OR HACKING THE NETWORK. ALL MY FRIENDS HAVE COMPUTERS SO THAT THEY WERE NOT MUCH HELP WITH THIS.

ANY HELP WOULD BE APPRECIATED.

Have you tried to go to Finder > Preferences > sidebar and uncheck Bonjoir computers?

Tags: Mac OS & System Software

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