Rules of thumb
1. If you're down by a rook and a queen, resign.
2. More than 2 windows system files dead in one chkdsk means you're probably dealing with a bad hard drive. The time to back files up is NOW, NOW, NOW.
3. The difference between someone who isn't curious and someone who is curious, at one time, used to be that they were about equal. Now Google has made that curiosity powerful: