please help me about dvd rom drive

okay i need help on what to do. my dad recently wiped out my computer for christmas. my dvd driver was working before then. now its doesn't. its a dvd rewritable. it opens and closes and the light comes on but my computer doesn't have it recognized. and also my sound doesn't work my dad says that i have a sound card. do i need to download something to make it work or what??

please help me and thank you in advanced

 

Check to see if your Device drivers are OK. Use Device Manager:
To open Device Manager: Start>Control Panel> System. On the Hardware tab, click Device Manager.
I would look at your Sound, Video, Game Controllers and your CD / DVD ROMs
In Device Manager, if there is a ? in front of your device, that means no driver is installed.
A ! means driver installation attempted but with problems.
System Information
If you have a retail PC, post the manufacturer name and model #
Use Everest to get a report of your system’s hardware, OS, and drivers. Upload the report as an attachment
Everest: http://www.majorgeeks.com/download.php?det=4181
Click "Report" at the top of the Everest window, click next to get to "Report Profile", select "Hardware-related Pages", click next, select "Plain Text", click "Finish". Then when it is done processing, click "Save To File". Save it where you want to. (I would use Desktop.)
Click "Go Advanced" in the MG reply box, scroll down a little way until you see "Manage Attachments", click it, browse to your file, click "Upload", and close the window. Then submit the post. You may have to also type something in the reply box, like, "Here's my report.", so that it will submit.
Chipset
Is the motherboard drivers installed/updated? This can also cause a problem with audio and other devices.
The motherboard chipset drivers are needed to allow the OS to correctly ID the onboard hardware, this then allows the right driver to install ok,. Usually, the chipset drivers, will allow Ethernet, USB, and Audio to be installed correctly.