Huh thanks kels... But it is not the problem, i remove them every time cuz there is no use for them i found the problem now , i removed "NETFX20.cab ,NETFX20.INF" when i put them back to the source it worked 100% now i want to know why i can't remove them ? , i have netfx20 silent install 16 MB but the cab is 20 MB the cd is 700 mb and 1 MB is impotrant for me