If you have installed Windows 8 on your Alienware M18x notebook, you might have noticed that the eject button no longer works under Windows 8 operating system. Dell, the parent company of Alienware has been silent about this issue. However, there is a quick workaround where you assign one of the app keys on the left to perform eject button action. To do that, follow these steps.
Download nircmd and install it on your laptop. Then, make a shortcut with this path ““C:\path\to\nircmd.exe” cdrom open D:”, where path is location of nircmd.exe on your computer and D: is the name assigned to your DVD drive. After making this shortcut, use the Alienware utility to assign it to one of the buttons. Download Alienware AlienFX Themes
Note: The eject buttons works on the Alienware M18x R1, but not on R2.