I have some problem with my pc (may be harddisk)..i am able to use my disk as a slave but when i use it as master my system hang everytime ..somehow i managed to install fresh window on a formatted c drive but still the problem persist... i ran memory diagnostic tool in win 7 after 37% it say ,some hardware problem detected but i am unable to complete the memory test because system hang and restart itself.. occasionally my system run correctly but whenever i play some music or left it as it is for some time it get freeze ... please help me what should i do , is there is some hard disk issues? please help..