Depending on the architecture of the client computer, you will need to use slightly different methods for the actual upgrade of client software from SMS 1.2 to SMS 2.0. Your users will not experience any disruption in their work, but because the process relies on users restarting the client computer, the actual upgrade process, from installation of the SMS 2.0 client software to removal of the SMS 1.2 client software, might take several days. This section provides specific information about: