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Cannot disable hibernation in Vista

I never use hibernation, so I want to claim that 2GB of disk space occupied by hiberfil.sys on my Vista notebook . However, I cannot disable hibernation no matter how much I try! As you know, there is no GUI for disabling hibernation in Vista; you have to open an elevated command prompt, and type "powercfg -h off". This is exactly what I do, but hibernation is automatically re-enabled after 5-10 seconds! hiberfil.sys is created, "Hibernate" pops up in Start Menu, and I can select hibernation related options in advanced power settings.

I tried the same thing by selecting "Hibernation File Cleaner" in Disk Cleanup, but the result was the same. When I  do the same thin in safe mode, hybernation is not automatically re-enabled, but when I boot normally, it is enabled again.

Configuration: Sony Vaio VGN-FZ11Z, Vista Businesss SP2 with all security patches applied (I had the same problem with SP1). It's in a domain, and I also confirmed with the domain admins that they don't enforce any power management policies with GPOs. I have another laptop with exactly the same SP and patch level, and I don't experience anything like this on it. The only difference is that it has Vista Home Premium on it.

Could you please help me with this EXTREMELY annoying problem? It's not a show-stopper, but it is still annoying.
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egokcen
Asked:
egokcen
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1 Solution
 
vinodsnair2001Commented:
Check out this link
http://vistasupport.mvps.org/disable_hibernation.htm
If it was helpful please mark YES
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vinodsnair2001Commented:
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egokcenAuthor Commented:
I wrote that I already tried "powercfg -h off". Hibernation seems to be disabled for only 5 - 10 seconds, then it is re-enabled automatically.
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McKnifeCommented:
This will be some background process most probably related to sony power management software or other power savers active.
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egokcenAuthor Commented:
I already thought of that, and uninstalled Vaio Power Management, too. Still the same...
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McKnifeCommented:
OK, I'll tell you how you'll get that bad guy: MOnitor who's changing the regsitry.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power is the path to audit.
Do you know auditing?
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egokcenAuthor Commented:
Clever indeed!!! I monitored C:\hiberfil.sys instead of the registry with Process Monitor of Sysinternals, and it turns out that prot_srv.exe, which is a component of Checkpoint Full Disk Encryption, is the culprit. I checked the executable; it's signed by Checkpoint, so it seems safe. Apparently, the process checks whether hibernation is enabled or not every 30 seconds, and enables it if it is not.

Now I have to find out why the hell a disk encyrption software does such a thing...
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McKnifeCommented:
Ask checkpoint support. It won't be without a reason.
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egokcenAuthor Commented:
Will do... Thanks for the heads up for auditing / monitoring.
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