laptop hanging problem..

[kaskal]

Asssalam alaikum to all my friends meri problem ye hai k laptop bar baar hang kar jata hai phir restart karna parta hai restart karne k baad kafi kafi der tak window main he nahi ata vo aik dot sa blink kiye jata hai 50 bar restart karo phir jaky kahin window main ata hai or main new window bhi kar k dekh li hai phir bhi problem continue hai ye koi hardware masla hai ya software or kabhi kabhi hang hone k few seconds baad aik blue cloure ki screen ajati hai uspe kuch likha bhi hota hai kafi a hardware error type...so plz experts guide me ye problem kya hai