Zohaib Qasim

I have seen many posts on this case but i cannot understand any of em. I am a newbie, and i am trying to solve this issue from last three days. Pls. someone can guide me through this and help me fix it. I will be really thankful to him. My Specs are:- HP Pavilion 13 x360 convertible - i5, 6GB RAM, 500GB Intel HD 520 Thanks really appreciated.