I like working with Origin and I use very often! But it is annoyingly that I have to wait a couple of seconds when starting the program. Otherwise Origin becomes stuck and the task manager will tell me that the program is not reacting. So I have to kill it and start is again. I find this behavior both for Origin7G and OriginPro7G.
Have you set up Origin to compile and build many Origin C files on start up? You should get in touch with your local tech support office with more details and they will be able to help you.