I searched through the question database and didn't seem to find a question similar to this, but forgive me if I missed it.
I've been using Unity for the past week or so, and everything was fine. Then, without any changes to the demo file, it would suddenly load blank. All the assets were imported on the project tab, but nothing in the hierarchy. What's worse, using the "First Person Controller" prefab in ANY project doesn't seem to work (it doesn't respond to WASD or MouseLook). For that matter, nothing dynamic does -- no animations, no scripts from what I can tell, only laying down models onto the scene.
I've tried moving scripts around in hierarchy, activating/de-activating scripts, re-installing Unity, making sure the scripts weren't modified from their original conditions, all to no avail.
If someone has encountered a situation like this before, please let me know -- I appreciate any help.