After installing a new driver, windows xp professional blue screens-2. you disable a driver which is critical to windows xp professional-after installing a new driver, windows xp professional blue screensuse the last known good configuration option to start windows xp professional because the last known good configuration does not contain any reference to the new (possibly faulty) driver.you disable a driver which is critical to windows xp professionalsome critical drivers are written to keep users from making the mistake of disabling them. with these drivers, the system automatically reverts to the last known good control set if a user disables the driver. if the driver does not automatically cause the system to revert to the last known good control set, you must manually select the last known good configuration option.you are unable to access your user profilewhen the problem is not related to windows xp professional configuration changes.a hardware device is failing to respondwhen startup failures relate to hardware failures or missing or corrupted files.