Assets folder not loading

Okay, this is a weird one, and it's related to the Unity editor. I am using Unity 4 on a 2gb RAM 32 bit computer and this is the first time something like this ever happened. When I create a new project or load another project everything works fine, but when I try to load my main project, it loads way too quickly and the assets folder in the Project tab is completely empty, even though the errors I had before are still there; material errors, normal maps, etc. I'm attaching two images: A screenshot of the Assets folder in Windows Explorer and a screenshot of Unity itself. Also, when I first opened the project in Unity it said the layout couldn't be loaded, and so I set it to default.

If it can't be solved, I will have reimporting everything as my last resort.

Thanks in advance.