Hi Brian,
This could be an issue with the DVD or the DVD drive that is unable to play it.
1) Is this issue specific to a particular DVD?
2) Which type of content are you trying to run/play from the DVD?
I would suggest you to run the Microsoft Fixit to fix issues with CD/DVD and check if it resolves the issue. You can follow the methods:
Method 1:
Refer to the link to run the fixit:
"Fix problems with CD or DVD drives that can’t read or write media "
http://support.microsoft.com/mats/cd\_dvd\_drive\_problems
Check if it finds and fixes any issues. If not, proceed to next method.
Method 2:
I would suggest you to uninstall and reinstall the DVD driver from the Device Manager and check if it resolves the issue. You can follow the steps:
a) Click on Start menu and type “device manager” in the search box.
b) Select Device Manager from the list.
c) Locate the CD/DVD drive.
d) Expand the DVD drives and right click on the driver.
e) Select Uninstall from the list.
f) Follow the onscreen instructions to uninstall the drive.
g) Restart the computer. Check if Windows reinstalls the drivers for the DVD drive. Check if the issue still persists with the DVD drive.
Please get back to us with the status of this issue.