Thanks for the reply. for problem no. 2. from Event Viewer, there is one error comeout which is EventID : 2000. I have google the eventid, so the result is : c0000013 (STATUS_NO_MEDIA_IN_DEVICE) and 04e80bb9: The error occurs when the server tries to access a shared resource (for example, a CD-ROM or floppy disk) which has no media (that is, no disk) in the drive. But, from this computer i can play the CD!.