@esd827 - looks like the service doesn't work for some people. I am researching solutions, but I need more info. Please answer these two questions:
1) Do you automatically log in, or do you have to enter a password every time?
2) If you log out, and then log in, does the start button appear?
@SIW2 - that's weird. Can you find some crash information? Like callstack, or a crash dump?
Does Paragon have any shell integration? If so, maybe it tries to affect the HDD icons or behavior. That would explain why opening Computer fails, because the HDDs are immediately inside. Try disabling it and let me know if it helps.