Well I've tried searching for terms such as "bitcoin" etc etc, however I have not had any luck, if I am honest I don't totally know what I am looking for exactly can you provide any guidance?
Try to remember how you might have renamed the file. It should be a .dat file as far as I know.
Here's some basic info on where a wallet's files are usually stored:
https://en.bitcoin.it/wiki/Data_directory