salam to all,

kuch arsa pehlay ITD pr aik bhai ke trick mili thi k agr windows ki key nahin mil rahi to hum key ko win ki cd k under se hi search kar k hasil kar saktay hain, mein wo trick bhool gaya hoon, please kisi ko yaad ho k win xp & win 7 ki cd k under se hi un ki key kese maloom kar sakta hoon, help me.