How to delete Hiberfil.sys file

To delete this file, you have to use the command prompt to manually turn off hibernation. If you turn off hibernation via Control Panel | Power Options, it will not delete the actual file itself.

Open a command prompt in Windows 7 by typing command in the search box. Right click Command Prompt and choose Run as Administrator.

To turn off or disable hibernation, type the following command at the prompt:

powercfg –h off

This will disable hibernation and will remove the hiberfil.sys file from your system.

You’ll have to restart your computer before it will take effect.

To turn on the hibernation again, type the following command at the prompt:

powercfg –h on

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Reduce the size of WINSXS folder

1. Click Start | Run
2. Type in CMD and press [enter]
3. At the command prompt, type DISM /online /Cleanup-Image /SpSuperseded and press [enter]

While you trying to do it, if some Error is shown than your OS was probably installed using media that already had SP1. In this case please use the Disk Cleanup tool:

1. Open My Computer,
2. Right Click on the Windows System Drive and click on Properties, 
3. Then from the Properties dialog click on "Disk Cleanup" in General tab.
4. Wait for a while to open the "Disk Cleanup" dialog.
5. Here it has an option on lower left "Clean up system files". Click on it.
6. "Disk Cleanup" dialog will re-open.
7. Now you will find "Service File Backup Files" in "Files to delete" box. Select it and click Ok.
8. A conformation pop-up will open,
9. Click "Delete Files" to Proceed.
10. Done

Vista

It depends on which SP your OS is running:

For SP1 use vsp1cln.exe
For SP2 use compcln.exe

Both tools are located in %windir%\system32

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