this problem started as soon as my original copy of Sony Vegas 8 disappeared from my computer
i went out and bought Sony Vegas 9 platinum edition and the first two weeks nothing happened then it started closing down for no reason or not responding after 30 to 45 minutes.
After that i took it back and (downloaded) Vegas 8, a few weeks were fin then the same issue, i thought it was the download so i tried another one, the issue continued.
last week i deleted Vegas 8 and downloaded Vegas 7. the same issue continues.
i really need this fixed.