Wich patch-level are you using on your VSE?
For version 8.5 you should use patch 8 but if it's possible it would be best using VSE 8.7i with patch 2 on Vista boxes
Thanks for the response.
Where would it tell me this information?
There is more than likely drivers on the system from the Security Center that is having the conflict. You can download this removal tool then reboot the system. If the issue still persists, you will need to uninstall and reinstall VSE 8.5P8. You can see what patch level you are at by right clicking the VSE icon and choosing "about" and towards the bottom you will see "Installed Patches"
Download McAfee Security Center Removal Tool: