I have had my computer and this version of Vista for more than a year. Recently though, whenever I try to save something on any program, the "Save as..." window doesn't pop up. I had this problem once before but it went away when I restarted the computer. Now though, I've tried restarting it a couple of times and the problem is still there. This and the prior time are the only instances in which this has happened on my computer. Is there anything I can do to fix this?