AMON block programs Vista

I need some help please with NOD32. I have Vista Ultimate, downloaded the newest nod32 installer earlier and installed normally. I chose typical instalation. After reboot NOD32 updated normally but all folders on desktop and My Computer folder were blocked, there was an error message saying C:\.....and the respective path is not accessible. Access denied. The same error with all my folders on desktop and my computer and folders from Start menu. After stopping manually AMON it came back to normal. So I uninstalled NOD32, restarted PC, installed it again in advanced mode, deselected Enable AMON. After restar it went ok untill I manually started AMON. Any suggestions, please? Thanks in advance