I appear to have found what may have been the problem. My BIOS was version A02. The current version is A05. After updating the BIOS, the functionality appears to be stable.
I may be calling these by the wrong name, but there are 3 types of menus/displays that aren't working properly: 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: System info:   Peripherals: Any help is greatly appreciated!
Preview/Contextual popup windows don't stay on screen