sir mere paas dell ka laptop hai pehley to sahi chlta tha lekin ab kholta hun to kehta hai windows is not genuine enter different product key

acha mere se ghalti ye hui ke main ne us main 1 cd laga di thi jab main my computer main ja kar cd rom device per right click karke eject karta tha to cd bahar ati thi

lekin ab windows hi nahin khul rahi to cd kahan se nikalun or wo cd main ne apne dost se udhar li thi

or is laptop main koi aisa point bhi nahin hai jahan se main cd nikal lun jaisey her cd rom main bahar diya hua hot hai

please resolve my problem
cd kaisey nikalun ab or windows kaisey sahi hogi