Hi, this is from a newsgroup post: "This warning event indicates that the Windows Vista/newer system closed the handle that is left by an application for a user's profile in order to make this profile unload. To close this handle many critical system components on the hard drive such as svchost.exe will be called and then the warning "1530" will be added by event identification system because of this. Therefore, this warning notice is created by the profile unloading system and is a normal behavior. Please be assured that it will not cause any system performance problem. Instead, it is designed for the stability consideration when a user profile attempts to log off". This maybe answer your question.