Does Device Manager indicate that there is a problem with either or both of your drives? Go to Control Panel>System>Hardware tab, click on Device Manager, then click on the + by DVD/CD-ROM drives, double click on each entry to see if Device Manager shows that there is a problem with either or both drives. If not, you could try clicking on the Driver tab and see if updating the drivers helps. If it doesn't, you can roll back to the previous driver(s).
Madeline.
-------------------- "Power tends to corrupt, and absolute power corrupts absolutely." Lord Acton, 1887.