Google Desktop Search is a great tool!
A very useful alternative to Windows search when you have to go through thousands of pieces of information stored on your own computer.
After you download the tool from Google, you install it and it will index all the information that you've got stored - documents, pictures, emails, etc. This may take several minutes to complete but it's only done once. After that, every search is practically instantaneous.
To read about it and to download, go to: Desktop Search
Read the Privacy statement that assures you that no content from your computer will be made available to Google.
Go to Preferences and customize the tool to what you need and you're ready to go!