I have a legal copy of XP Pro Windows which has been running on my desktop for several years now. This morning when I booted, the process stopped showing only my desktop background. In the icon tray there was a star, and when I right clicked it, it said "Validation error". I tried to reboot and ever since, Windows stops at a point showing only my background and the command bar empty. None of my desktop icons show, and the Start button shows only black rectangle.
I tried to boot using my XP Pro CD, and it got as far as showing some, not all, of the desktop icons. The Start button still does not show anything. I have to use the hardware reset to reboot.
Can anyone tell me what this means and how to fix it?