Microsoft recommends turning on automatic updates and setup a certain install time. However many updates provided by Microsoft will conflict with other programs or third party applications you have installed yourself. I highly recommend reviewing all updates before going through the install process. Especially if your running a network. Network admins almost all the time make the mistake of updating security patches which will hinder certain inside application within the network. Such as, terminal services (your ability to remote desktop). Point being said, review your updates especially your security patches.