Do it have a software to wipe o fill the unused ram in windows?  

Not sure about a software solution, but there is a very effective hardware solution.

It is the Power button.

Also Windows automatically zeros free memory pages in the background. This is done for security reasons, so that one process doesn't get given data from another process when additional RAM is requested.

Goggle "zero-page thread" and "Demand Zero faults" for details.  

I tryed to load a file in notepad.exe, then close it.
When i inspect hiberfil.sys i see the text again into.
The "zero-page thread" not works when hibernate?
Do it is possible to launch "zero-page thread" via c++ code?
ty.  

- Passmark

It is the Power button.

AND wait 35/40 seconds attending the machine after having switched it off , to prevent a ninja hacker to quickly disassemble the machine and freeze your RAM sticks .
icanhascheezburger.fil...-ninja.jpg

I tryed to load a file in notepad.exe, then close it.
When i inspect hiberfil.sys i see the text again into.

Yep, but that would be part of "Windows used memory" and not part of "unused" one.

A similar recent thread:
reboot.pro/topic/17935-wipe-ram/

jaclaz
_________________
- In theory there is no difference between theory and practice, but in practice there is. - 

> When i inspect hiberfil.sys

You asked about RAM. The hiberfil.sys file is a file on the disk & not RAM. Although like many files on the hard disk it contains content that was in RAM at some point.

If your real question is how to avoid data in the hiberfil.sys, then you can turn off hibernation.

You might also want to zero the page file via the registry change.

[HKEY_LOCAL_MACHINESystemCurrentControlSetControl Session ManagerMemory Management] "ClearPageFileAtShutdown"=dword:00000001  

Disable hyberation, clear page file, power off pc... I Know!
But i would use hyberation and reset to zero unused memory on the fly when I want.
Do it is not possible?  

- avocadus

Disable hyberation, clear page file, power off pc... I Know!
But i would use hyberation and reset to zero unused memory on the fly when I want.
Do it is not possible?

Please define "unused memory" (whilst a Windows NT based OS is running).

jaclaz
_________________
- In theory there is no difference between theory and practice, but in practice there is. -