For a while now, I was experiencing all kinds of issues with Outlook 2007 and Virtual PC 2007. For instant, when I'd be writing an email, the Ctrl+Arrow keys would work intermittently. This is really annoying, particularly when answering people's emails. The problem was even worse for Virtual PC 2007, where some keystrokes wouldn't be recognized until I pressed them 4-5 times. Finally, I called Microsoft Tech Support. The guy looked over my process list and promptly decided that iTunes and Google Desktop were the culprits. For what reason, I don't know, but I was too tired to argue...