Sometimes the set up of my PC seems to change and when I hit the tab key, instead of the cursor going to the next text box, it shuttles between screens of the internet or other documents which are open. Also, when I left click on the microsoft shortcut bar, it behaves as though I have right clicked on it. It seems to do this independently. Is there any way I can set it not to do this or change it back as it's sooooo annoying!!