SW = Software.
Basically when you deploy SEP or other applications to a machine that has Deep Freeze on it, the thaw commands do not always work. So those machines ends up reinstalling the same software everytime it reboots thinking the job has never been ran. And in the case of SEP results in duplicate GUIDs in our SEPM console.
And then there is the thaw and freeze with viruses on the machine, DF console not seeing all clients, consolenot connecting to a port yada yada.