the product key inserted at the back of the laptop is false.whenever I was trying to download something for registration or activation, I could not get the 25 or 45T digits.before I finish, it indicating not valid digit
Almost all laptops are not valid. They are OEM keys and MS doesn't know about them and no one should be asking for that key. I have never had to put in a key either do download anything. On some MS pages you need to cut and paste a key that their program comes up with. You don't use the key on the computer.
1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.