The system tray is in the bottom-right corner and it typically doesn't have anything to do with NumLock, so I'm not entirely sure what you're referring to. Can you take a screenshot for us? Just press Print Screen (or PrntScrn) on the keyboard, open Pain, press Ctrl+V, save it as a JPG (on the Save As screen, select JPEG from the Save as type list), and attach the file to your next post. If you need more detailed instructions feel free to ask.
Also...have you tried clicking on this icon tray and dragging it elsewhere?