Hi Marc
I have used Agent Ransack for my search engine for a long time.
It works better then anything that Windows has come up with and really will find anything.
It adds a command to the right click menu so it's really easy to use, just point at the location you want to search, select Agent Ransack, put in the search term and in seconds you'll find anything that matches.
If you've never tried it, give it a try, it's free.
http://www.mythicsoft.com/agentransack/download
You'll never use Windows search again. LOL
Mike