Question

Challenge for all masterminds

i'am an 8 letter word
First 4 is the question
2,3,4 protects our head
6,7, 8 is a software
7,8 are same letters.

Who am i?
Hint : u daily use this word.

Answer 1

here is your answer :-
"WHATSAPP "

what is a question word
hat protects your head
app is a software
pp are same letter