I do the same thing when it comes to numbering and using the name box. I right click to get at menu information for changing file names and such, and when I encountered this problem I was working on arranging some folders in a hierarchy. But you probably know how it goes--you do something so often that you don't even think about what you're doing--you think "I want to look at something" and your hand just clicks, without your thinking "I need to mouse over a file name and right click once or twice." So I have to watch what it was I was doing. As long as I carefully did a single left click it was cooperating. I'll emulate the problem again later and write down the code. It's something I want to keep track of, because I'm sure I'll run into it again somewhere else.
Liz, part of the problem with losing my expansion space (my old HP Pavilion had tons of space, the new one is already full, now that I've added a floppy) was solved by picking up an external hard drive enclosure. I'm not sure what the insurance folks are going to say about this, but it accomplishes what I wanted with the tall case on my old computer. The way to put a hard drive into use that isn't the same one as my external free-standing hard drive. It works out functionally about the same, but this can (at this time) hold a much larger disk drive for a lot less money (in other words, I could get two of these and use one as my external backup drive and one as my expansion room but that's not the setup I had before so the insurance folks probably wouldn't pay for it).
What you could have done with something like this is take the old hard drive out of the first computer, plug it into the HD enclosure, and run it like a slave drive. It would cut out one step. If they ever find my other computer, I'll take that hard drive, plug it into this box, and transfer all of my important files.