Some action might be setting the REBOOT property. You should be able to see that in the log. The most common reason is probably files in use.
I don't know why the original code was failing but I have ended up settling on the following which only does a reboot on upgrade or uninstall.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.