I have a problem replacing ntoskrnl.exe on XP SP2. Each time i replace it the system file protection copys original file over it. I tried replacing ntoskrnl.exe in windows\system32, windows\Driver Cache\i386, windows\Driver Cache\i386\sp2.cab, windows\system32\dllcache. They all stayed modified, and when i replaced the system32 one it changed again! It is the only copy of that file in the system. I even tried disconnecting from internet if it was pulling file from win update, but that was not the case. What can i do?