I have been running Windows 2000 on an old PC for many years. There has always been a bar (don't know what it's called) along the bottom of my computer screen that has whichever programs I'm running, my quick-start icons, and several other icons. A couple of days ago, this bar jumped to the right-hand side of the screen, and I can't figure out how to get it back. Then today, while I was trying to move it back, it suddenly appeared along the top of the screen. Can anyone please tell me what caused it and, more important, how to get it back along the bottom?