We tried to install SP4 on our main cluster this weekend. THe SP started OK, and seemed to run fine, but it reached a point where the message said, "Setup is performing required operations on cluster nodes. This may take a few minutes..." It ran for a while then the whole install window disappeared. No error code, no exit info. In the task manager, the setupsql process ran for a time then it too disappeared. This behavior was seen three straight times. Since it was so late, and since everything seemed to be working, we left it to research this morning. This morning, I start to inspect the situation. The binaries for SQL for that instance now show 5-05 for their dates, the version listed by SQL is Service Pack 4. The event viewer has this message: "18802: SQLSETUP: The service pack installation for HDQ-C01-N01/S1 has ended." Did the install succeed and I miss something? I inspected sqlsp.log and saw nothing related to an error (though this line was stating a reboot was needed, which we did not do: "01:53:00 Process Exit Code: (3010) The requested operation is successful. Changes will not be effective until the system is rebooted." Do I need to reboot the system soon because of this? I am used to seeing the window complete with a success/fail window on non-clustered boxes. Is this behavior due to the clustered environment? I can't find any help in the knowledge base so anything anyone knows would be appreciated.