Ever lose a file on your system and you can't quite figure out how?

I created the psds on Saturday the 28th at 9pm.
Now I have the sliced images etc.

I shut down my system every night before going to bed because the fan is just too loud.

The next time I used the same files and altered them was Sunday the 29th around 12:51pm.

Here it is Monday morning at 5 am and I cannot for the life of me find the files.

They are not in the folder for the design I am working on. Good thing they are only elements of the design like a menu and post header and can be easily recreated. but this is making me crazy.

I'm doing a systemwide search but no results so far