Preview/Contextual popup windows don't stay on screen

I may be calling these by the wrong name, but there are 3 types of menus/displays that aren't working properly:

1. Task bar preview windows
2. ALT-TAB options
3. Contextual drop-downs in applications

The behavior is the same for all. The menu/display will appear for a fraction of a second, and then disappear. The first two are pretty self explanatory - the previews on items in the task bar that pop up above the task bar, and the open windows when you press ALT and Tab. These both appear for a fraction of a second and then disappear.

For the last one, when I'm in an application that uses contextual drop-down menus, the same behavior is seen. For example, with Coffee Cup's HTML editor, when I type an HTML tag and hit space, it presents an in-line dropdown menu which shows relevant modifiers to that tag. The menu displays for a fraction of a second, but almost immediately disappears.

Steps I've tried to date:

1. Disconnect everything from the laptop, including the power cord (thought it might be an external device causing problems)
2. Use an external mouse and deactivate the built-in trackpad (thought it might be registering movement when none existed)

System info:

• AlienWare M17x
• Windows 7 Home Premium 64bit
• 4 GB RAM

Peripherals:

• AlienWare OptX monitor
• Logitech G15 keyboard
• Logitech LX3 Optical Mouse

Any help is greatly appreciated!