After having my hard drive attacked by a virus ....
Oh Robert, I really feel for you. That happened once to me and, in addition to losing everything on my harddrive, I lost the harddrive itself (it was totally fried!). I lost many of my photos taken during my first trip to Alaska! I grieved

, then got a bit soused

, then got angry

, then resigned myself to the fact that I had to make sure this didn't happen again. Now I'm a virus scanning maniac and I organize/archive everything I shoot. I keep working images on both my internal harddrive (and copy those to my external harddrive) and burn the originals to DVDs and store them in a safe place.
When you feel up to it, you may wish to read
http://www.digicamhelp.com/how-to-organize-and-archive-digital-images/index.htm . It might provide you with some tips you can use.