Here's another useful free program:
http://www.copernic.com/
Works brilliantly well, and will enable you to find any file on your hard drive in a fraction of a second.
Fast – Easily search your entire hard drive in less than a second to pinpoint the right file, email, music or picture.
Fresh – New and updated files and new emails are indexed the instant they arrive on your hard drive.
Ultra-Light – Utilizes CPU, memory, and disk space efficiently to ensure continued high levels of system performance.
Easy to Use – Simply type words into the deskbar, and CDS finds all relevant documents in an instant.
Rock Solid – Fault-tolerant technology ensures that your PC is searchable at all times.