C009: Extended wait time on Windows 2000 whilst showing message 'Applying security policy'

You wait for hours and hours for Windows 2000 to load, whilst a message is displayed 'Applying security policy'

You're security database is corrupted (probably happened when the machine crashed at some point). Just follow the instructions given at http://www.jsifaq.com/SUBH/TIP3500/rh3561.htm. Don't worry if you can't do the very last instruction due to 'access denied', just reboot and everything will be fine!