I am using Windows XP sp3. Have just installed the Vegas Movie Studio 9 platinum software and registered the product successfully. Program opened ok. I then closed it so I could connect up my DAC-100 analogue to digital converter so I can bring in video from my Hi8 cam corder. I then restarted movie studio and it hung during opening and was not responding so used task manager to close it. Has anyone else had this problem? - I don't know whether I have a computer hardware, XP, Movie Studio or DAC problem! Re-booting computer and not using Movie Studio or DAC-100 and the rest opf the computer is operating fine.