mujhe umeed hai k ITdunya k members theek hun gai mera problem ye hai k main apna computer use kar raha tha tu achanak light chali gai aur jab ai tu PC on kiya tu welcome pe a kar black secreen agai us k baad restart ho jata aur jab mane window install ki tu 32 mints pe akar ruk gya aur us k agay nai ho rahi..........plz help me....