Click start control panel
administration tools computer management device manager scroll down cd-dvd rom
drives you might see a yellow question /exclamation mark ? ! or a red X
right click to update driver
You
might have to physically unplug the leads for this cd/dvd computer then
plug them back in restart your this should activate the found new hardware
wizard.
If this does not fix the
problem it might be a registry problem
"you only need to do the following"
if you cant see your disk
drive in windows explorer
Close all open
programs
Click on
Start, Run, and type
regedit and press
Enter
Click on the plus signs (+)
next to the following folders
HKEY_LOCAL_MACHINE
SYSTEM
CurrentControlSet
Control
Class
{4D36E965-E325-11CE-BFC1-08002BE10318}
This folder
is the DVD/CD-ROM Drive Class Description in the registry. Look for any of the
following names in the right hand column.
Upper
Filters
Lower
Filters
Upper
Filters.bak
Lower
Filters.bak
If any of the above keys shown in step
4 are listed, right-click on them and choose Delete
After deleting the keys, close the registry editor
Reboot your computer
Open My Computer and
check to see if your CD or DVD drives have returned.
You may
also want to open Device Manager and verify that the yellow exclamation and
error code on the CD or DVD drive is gone.
if this
fails to fix the problem
It could be a problem with the lens you could
use a liquid type lens cleaner place 2-3 drops on top of a cd/dvd then run it
http://www.nextag.com/dvd-lens-cleaner/shop-html
http://www.infopackets.com/news/hardware/2005/20050315_clean_cd_or_dvd_rom_lens_with_a_brush_part_2.htm