A couple of days ago on my work computer (Excel 2010), when I would open the Paste Special menu using the keyboard shortcut Alt+E+S, the window would open up, but it would not be the active window. It did not have a blue outline indicating it was the active window. I couldn't use either another keystroke ("V" to Paste Values) or the arrow keys to toggle between the Paste Special Choices. If I would somehow select the window (clicking with my mouse, Alt+tab, the windows key), then it would become active and I could use the menu normally. I have changed nothing that I'm aware of in the last couple of days (or the last couple of years for that matter) on my work computer and am baffled as to why Excel is acting this way. Would love to hear any suggestions! Thanks.