soknguon

I got some problems in my computer. My computer used to have CD, DVD and webcam player, but now they are not there. Anyone know why it happened like that? When I turn on my computer, there are no signs of my cd or dvd in my computer any more. Now I can only use Locol disk (C:) I used to have Locol disk (D:) and Locol disk (E:) but they are not there now. Please someone help me, or tell me why it happened like that. Please tell me to get my cd and dvd back, Thank you.