For the last few versions of DesktopX I have had this problem.
Under preferences I have unchecked the box to Run automatically when Windows starts.
DesktopX still continues to start when I reboot.
This is quite anoying as I don't want it to run without my launching it.
I know I can probably disable MCP Smart Startup in SDC, but I really shouldn't have to do that.
And before anyone asks... No, DesktopX is not in my Startup Group...