1. No keyboard detected. Press F5 to continue.
2. Mouse move change: Your mouse has muved. Windows must be restarted for the change to take effect.
3. COFFEE.EXE Missing. Insert cup and press any key.
4. Buy a Pentium 586/90 so you can reboot faster.
5. 2+2=5 for extremely large values of 2.
6. Press any key to continue, or ani another key to quit

This are the funnyest errors I know by hearth, if you know more like this please respond or respond with your opinion about this:d;)