In Windows XP computer, the existence of the hiberfil.sys file can not run a thorough disk defragmentation. Here we will emphasize how to remove it in order to ensure thorough defragmentation for Windows XP.
A lot of XP users love to use the hibernate function that will save you time to shut down the computer. But keep in mind that there will be a file named hiberfil.sys generated when the computer enters hibernation mode. Normally, Hibernation takes everything in memory and writes to your hard drive as the hiberfil.sys file, that is, hiberfil.sys will be about 512 MB if you have 512 MB of memory and about 1GB if you have 1GB. When the computer is restored to normal mode Windows XP will automatically delete this file, but leave it intact on the hard disk, taking up a large amount of disk space. If you've ever looked through the report carefully analyzes the defragment defragmenting your XP computer, you will find that there are some files that can not be defragmented, and one of them is the hiberfil.sys file, which becomes a stumbling block for thorough defragmentation, but not just a waste of space on the hard disk. So it's time to delete it from your computer free of charge to ensure a thorough XP defragmentation and free to use more space.
Normally, this file is hidden under C: \, and we manually delete it from your computer. However, it is recommended that you use the down method to automatically delete: go to Start, then Control Panel and run Power Options, click the Hibernate tab, and clear the "Enable Hibernation" Click OK to save the settings. Then, it generates the hiberfil.sys file will be automatically removed from your computer, and you'll get back to your hard drive space.