Help me plies

So I have this problem with Sony Vegas 6, 7 and 8!

Everytime when I'm opening Sony Vegas, I will get the following error:
http://666kb.com/i/avgr1g6znh0f29hdz.jpg
And when I'm pressing "Ok" it will stay freezing at Initilaizing UI...
But in my Windows Taskmanager it's active, but I'm not seeing it.
http://666kb.com/i/avgr91h79yh9tk37r.jpg

What I tried is, reboot and a reinstall and I don't want to format!

So please can somebody help me to solve my problem. :'-(