1. desinstall an old linux distro that you don't need any more to increase the size of your full c:\
  2. reboot
  3. discover that your MBR is completely fucked up and you can't reboot your machine at all
  4. try the repair console of your WinXP CD and discover your Admin account is locked (why the hell is it locked ? I never touched that) so you cannot repair your machine!
  5. visit my good and old friend Jean-Claude Bellamy's web site and discover he has a solution to blank the admin password
  6. burn the iso onto a cd and use that cd ; unlock the admin account and clear the admin password
  7. finally use your repair console and call fixmbr
  8. shout "yay!" and reboot
  9. discover with horror you lost your data partition with your mozilla trees and work documents
  10. use a partition editor able to restore a completely hidden partition
  11. reboot, and start to breathe again, letting your adrenaline level slowly decrease...