Hello, I tried to make an unattended replace of notepad by notepad++, but got a problem (didn't work at all) This is what i ve tried : 1. i replaced the the file sfc_os.dll (which is responsible for the Windows File Protection) by the one in the bottom of the page (for XP SP2)Official. 2. i integrated a script that copy the modified notepad.exe in dllcash, system32 and windows directory, 3. i put also the reg file ;Disable WFP [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] "SFCDisable"=dword:FFFFFF9D 4. in runonce method, i made execute the script after the Windows install, after the reg file Well it worked for few seconds and then Windows however cancelled it and restored the original notepad To made thing worse, il is no more possible to replace it even manually ... (Windows restore immediately)... Someone could help me please ? PS : a little more precision, my Windows XP SP2 has got postSp2 hotfixes untill Sept 2005.