Before doing anything like this always make a backup. Have you tried a search of your HDD?
I recently did a reset to my computer to improve performance. I had two options while doing the reset. One was to "keep my files" and the other was to remove everything. I chose to "keep my files". Upon startup after the reset I found that my documents, music and personal videos were still there but the file with my pictures was empty. What if anything can I do to restore or find them?