This article provides different scenarios for choosing the option of not rebooting after patches are installed.
No users logged on
Automatic restart immediately after installation.
Single user with administrative privileges
Restart notification allows the user to initiate the restart or postpone the restart. This notification does not have a countdown timer. The user must initiate the system restart.
Single user with restart privileges but no other administrative privileges
Restart notification allows the user to initiate, but not postpone, the restart. This notification does not have a countdown timer. The user must initiate the system restart.
Single non-administrator without restart privileges
Restart notification does not allow the user to initiate or postpone the restart. This notification does not have a countdown timer. The user must wait for an authorized user to initiate the system restart.
Administrator while other users are logged on
Restart notification does not allow the user to initiate the restart, but it allows the user to postpone the restart. This notification does not have a countdown timer. The user must initiate the system restart.
Non-administrator with restart privileges while other users are logged on
Restart notification does not allow the user to initiate or postpone the restart. This notification does not have a countdown timer. The user must initiate the system restart.
Non-administrator without restart privileges while other users are logged on
Restart notification does not allow the user to initiate or postpone the restart. This notification does not have a countdown timer. The user must wait for an authorized user to initiate the system restart.