I'm running Win XP (SP3) and I've noticed an irritating glitch in the last few months which I've finally solved, so I thought I would pass it on. It's pretty trivial, which is probably why I could find nothing for it.
I've always set Explorer to open a folder in the same window, but suddenly it started opening a separate window, which might mean I had a dozen or so windows open when I was searching for something (for instance a photo I'd mislaid) I had a desultory try at solving it before, but I finally tried reversing the choice and it worked! In other words, when you click on tools/folder options in Windows Explorer the box that opens shows as the second choice 'browse folders' and you can choose to open a folder in the same window or to open in a separate window; this has become reversed. So if you choose to open a folder in the same window it will open in a separate window and vice versa. Anyone else had this problem?