Just a few days ago, a friend was having trouble with Excel on a ThinkPad: "My cursor keys are broken! I can't move to a different cell, it just makes the whole

Just a few days ago, a friend was having trouble with Excel on a ThinkPad: "My cursor keys are broken! I can't move to a different cell, it just makes the whole sheet move around." I scratched my head and thought to myself, "Naw, it couldn't be Scroll Lock. Could it? That keyboard doesn't even have it." After a quick search I suggested hitting the Windows key and typing "keyboard" to bring up the onscreen keyboard. Sure enough, ScrLk was lit up, and a quick tap on it brought things back to normal. Turns out that Fn+K is the Scroll Lock toggle on recent ThinkPad keyboards, and Excel actually responds to Scroll Lock mode to scroll the sheet instead of moving the cursor to a new cell. It's a mystery how it got toggled in the first place, but my guess is that she meant to hit Ctrl+K and hit Fn+K by mistake. And of course there is no indicator light or anything to let you know that the keyboard is in Scroll Lock mode. Thank you modern keyboards!