Evidently, Crysis is having issues on some systems running Direct X 10 and up. Some of these problems manifest themselves as intermittent freezing and crashing upon startup, a menu mouse pointer that is limited in movement range and seems to have trouble finding buttons and so forth, sound stuttering and crashes upon map loading. Fixing these issues is actually dead simple - all you need to do is add "-dx9" to the game's launch parameters.

Here is how you achieve this:

1. Right click on the game. Click on Properties.

2. Under General, click the Set Launch Options button.

3.Type in -dx9 in the box.

Now run the game. It won't eliminate all problems, but it has rectified many of the problems I was experiencing immensely.