Photo Gallery is the lightweight program that comes bundled with Windows. I used it on XP with this never happening, but it occasionally pops up in Vista. To scroll to the next picture in a folder, all you have to do is click on the right (or left) arrow. Most of the time this works fine. Sometimes though, it will jump 5 (or sometimes 6 or 7 photos). I have no idea why it does this, and why it reverts to scrolling one photo at some point later.
I can’t find an options menu. Help! It’s ridiculously frustrating.