hiberfil.sys is a file the system creates when the computer goes into hibernation mode. Hibernate mode uses the hiberfil.sys file to store the current state (memory) of the PC on the hard drive and the file is used when Windows is turned back on. In Hibernate mode the PC power is down entirely, so you can even take the battery out, put it back in, and be right back where you were. hiberfil.sys is a hidden file. It means that you could see it in windows file manager only if you checked 'Show hidden files and folders' in Folder Options.  

hiberfil.sys is Windows system file and you can’t simply delete it as you would for, say, a file that you yourself created but no longer wanted on your computer. To delete hiberfil.sys in XP: go into Control Panel –> Power Options –> Hibernate tab. Uncheck the box, reboot your PC, and then you can delete the hiberfil.sys file. For Windows 7 or Vista run command line utility as Administrator and type “powercfg -h off”.

Get more detailed information about hiberfil.sys and all other running background processes with Security Task Manager.

Note: Any malware can be named anything - so you should check where the files of the running processes are located on your disk. If a "non-Microsoft" .exe file is located in the C:\Windows or C:\Windows\System32 folder, then there is a high risk for a virus, spyware, trojan or worm infection! Check it out!

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Users Opinions

472 users ask for this file. 3 users rated it as not dangerous.

All comments about hiberfil.sys: If you have problems when enter or resume from hibernation, check Microsoft if you have XP - http://support.microsoft.com/kb/907477/ or for Windows Vista and Windows 7 - http://support.microsoft.com/kb/950686  See also: Link   Alex This is the Hibernate File used when Windows goes into Hibernation. Hibernate is very useful because it takes a snapshot of what is going on with your computer exactly before stating "Preparing to hibernate". This file is only as big as your total RAM is and can be safely disabled. however if you Disable this file, Windows will be unable to use hibernation. I personally find Hibernation very convenient.   TechWizard86 if your computer doesn't come out of hibernation, then a virus deleted it.   If you know more about hiberfil.sys, share your knowledge and help other users. Security Rating:  --- don't know ---  1 (not dangerous)  2  3 (neutral)  4  5 (dangerous) What do you know about this file: Link for more details: Your Name:

More process information

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Other Processes

alg.exe audiodg.exe csrss.exe ctfmon.exe desktop.ini dllhost.exe dwm.exe explorer.exe hiberfil.sys internat.exe kernel32.dll logonui.exe lsass.exe lsm.exe mdm.exe mobsync.exe msmsgs.exe mssearch.exe mstask.exe pagefile.sys penservice.exe regsvc.exe rundll32.exe sdclt.exe services.exe slsvc.exe slwinact.exe smss.exe spoolsv.exe svchost.exe system taskeng.exe thumbs.db wercon.exe winlogon.exe winmgmt.exe wmiexe.exe wmiprvse.exe wpcumi.exe wscntfy.exe wuauclt.exe wudfhost.exe
[hiberfil.sys in German] [all processes]