1st choice after drivers are installed and the comp won't start (if it starts then the registry has been rewritten and you can't use this) Last Known Good Configuration
2nd choice after the comp starts but hangs later after you logon Safe Mode and Device Manager to disable the driver
3rd choice if the comp hangs in Safe Mode, use the Installation CD and choose Recovery Console to disable the driver or repair the MBR
4th choice used to replace corrupted or missing system and boot files, start your computer with the installation CD and select R to use the ERD