Hello, Why everytime I run my AVG scanning tool, the status of kernel32.dll,user32.dll,shell32.dll and ntoskrnl.dll are 'CHANGED'. Anyway, the after-scanning status is "No threat found yet". Thehefore, I assume my laptop is fine. Anyone can tell me what are these files and what program or programs, which I installed, had triggered these status. When my laptop is fresh (recovery and reformatted), AVG do not show these message.