Now that you have confirmed this solution works, I will send a message to my contact at Magix and get him to contact Microsoft.
It seems that the Microsoft security database is out of date and not properly recognizing that some Vegas programs are legit.
Remember to turn everything off at least once a week, including your brain, then sit somewhere quiet and just chill out.
Unplugging is the best way to find solutions to your problems. If you would like to share some love, post a customer testimonial or make a donation.