A couple of suggestions:
See the thread here:
viewtopic.php?f=3&t=406&p=664&hilit=freeze&sid=6f5f8586d665ac0f1b82f689f621b64a#p664In that vein, what other software do you have running on the PC? What Firewall and anti-malware (antivirus etc.) is running? It is possible that some other program is interfering with the start up process and anti-mailware programs are the most probable suspects. It may take some determined work to discover which one it is and why and what to do about it. There are some good utilities available to help with this, but it kind of depends on what is happening to decide what to do and what tools best fit the troubleshooting actions to take and I don't know enough about the problem to suggest a tack at this point. These tools throw a tidal wave of information at you and finding the tiny bit of information needed in the mass is sometimes overwhelming. I use a program from Microsoft, called "Autoruns" to remove programs from the list that is loaded at boot-up "1-at-a-time!" and reboot to see what happens. If things get better then I have found the major culprit, (and if things get worse, I know to put it back!) It does require the user to know enough to not just randomly remove stuff, you need to know which programs are inportant and which are just aids and helpers that are not absolutely necessary. (I can help with this if you want.)
Also, I'd recommend completely uninstalling VDV and deleting all folders/directories associated with VDV, (If you need help with this just ask, I won't waste time here in case you already have a good handle on it). Then do a general clean up of the disk and the Windows Registry (I would use a program like "CCleaner" to to this, but there are other tools that can be used... just be sure you KNOW what these programs do and how to control them so they don't eat something you really want to keep!... I can help you with this also, if you wish). Once the computer is cleared of all VDV vestiges, then reinstall the program to see if that clears the problem.
I am sorry that there is not a simple, "do this and it is fixed", but there are just way too many variables from one computer to the next, so it always takes some work to eliminate bits and pieces to see which one is causing the problem. It is possible that it is just a matter of finding the right checkbox in a program and clicking on it, but I suspect it is some incompatibility between two programs and we just have to find them and beat one of them senseless with a baseball bat (well... Figuratively at least!

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