Dear Kathy, my hard drive died in my iMac which is surprising as it is not too old. As my old photoshop was on the old one and I never did get on with it! I looked around and found Acorn software that do a photo editor for Humans. It does everything that photoshop does, but you do not need a PhD to use it, and it then does a bit more. It is for Mac's although i do not know if they do one for windows.
Simple to use and you save files in most of the current file formats or you can simply change them, i.e JPEG to PNG to GIF etc.
The help is great and I like this program, I also like the price! $31 downloaded to you with all the trimmings!
http://flyingmeat.com/acorn
Regards.
Neil.