Any chance this an Acer Brand computer?
You could have a virus or-
How to fix this- not for the inexperianced as you can srew up your mahine pretty easy-
1) Click Start, Control Panel, Administrative Tools, Local Security Policy.
2) Click the + next to Local Policies to expand it, then click on Security Options.
3) Find "Devices: Restrict CD-ROM access to locally logged-on user only" and make sure that it is Disabled. This SHOULD not affect your ability to use the CD-ROM if you are at the computer, but it has done so in a few cases.
4) If it is Enabled, Disable it, and then shut down and reboot Windows.
If the last procedure did not help, try this:
1) Open the System Registry -- CAUTION: Do not do anything in here that you are not sure of. Changes here can be catastrophic if not done correctly. -- To open the Registry, click Start, Run, type REGEDIT, and then click OK.
2) Expand HKEY_LOCAL MACHINE
3) Expand SOFTWARE
4) Expand Microsoft
5) Expand WindowsNT
6) Expand Current Version
7) Don't expand, but click on Winlogon
8) In the right pane, double-click on allocatecdroms, and then change the value to 0.
9) Close the Registry, close Local Security Settings, shut down and restart Windows (shutting down and restarting Windows may not be necessary, but it's better to be safe).
