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Help wont let me wipe cache (error)

hi guys i have just recieved a galaxy s4 off my brother , it is on the 3 uk network and i has not been rooted.

it lets me wipe the factory data

BUT

everytime i have tried to wipe the cache it says ERROR and then restarts itself

also when i go into recovery mode the little green android man has a red triangle sign from his chest and it says NO COMMAND.

can any one advice me please

many thanks
 

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