Windows XP A to Z - http://www.softwaretipsandtricks.com/windowsxp
Remove hibernation file
http://www.softwaretipsandtricks.com/windowsxp/articles/246/1/Remove-hibernation-file
Super Admin
 
By Super Admin
Published on 02/24/2005
 
If you do not use hibernation, make sure you do not have it enabled

Remove hibernation file
If you do not use hibernation, make sure you do not have it enabled, which reserves disk space equal to your RAM. If you have a hidden file on the root directory of your C-drive called hiberfil.sys, hibernation is enabled. To remove that file, go to Control Panel, select Performance and Maintenance, Power Options, Hibernate tab, and uncheck the Enable hibernation box.