Windows XP My computer stayed on with screen down. When switching on the screen after a day or two, the following message appeared - "Windows can not start because the following file is missing or corrupt WINNT\SYSTEM32\CONFIG\SYSTEM You can attempt to repair this file by starting Windows Setup using the original Setup CD-Rom Select "r" at the first screen to start repair." My action - put in the CD to boot from CD Blue screen appears after a while - at the top "Windows Setup" and towards the middle the following message - "File \i386\ntkrnlmp.exe could not be loaded. The error code is 4 Setup can not continue. Press any key to exit" I have followed this procedure over and over and does not make any progress. I also tried to go back to the last working configuration. I also tried to start up in "safe mode" No success! Any help would be appreciated.