check if you have that file c:\windows\dwmglass.dll check if the reg value "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\AppInit_DLLs" is set to something... check on taskmanager if you have any aerohost.exe I found dwmglass.dll in c:windows and i found the reg value DWMGlass.dll, in the taskmanager i dont have process aerohost.exe i have stopped now any processes with agtweaker thx for helping