It would appear that your DVD drive is trying to automatically run a disc that has been previously inserted. Try this (taken from another forum)...
Method 1 (If autorun.inf file is present)
Go to control panel then folder options. Press tab view and check view hidden files and folders.
Then go to the device not opening and explore it. Look if you see autorun.inf and if present delete it. Then re-boot.
Method 2 (If autorun.inf file isn't present)
Go to command prompt and write the following.
attrib -s -r -h X:\autorun.inf
press enter and then write
press enter and after this re-boot.
Note: Please notice that X means the drive letter (F:\, G:\, etc).