help please ???

ok so I upgraded to a 500 gb hdd lika a month ago and I was working fine but then today I turned it on and it says cannot start correct hdd not found so I restart it now it works but is it gonna keep doing it and y did it happen???????????

hmmm nots supose to do that cuz my friend upgraded to and his works amazingly fine, r u sure u did the operation correct?

hmmm nots supose to do that cuz my friend upgraded to and his works amazingly fine, r u sure u did the operation correct?

hasnain608