1. Uninstall Vegas Pro (and DVD Architect if using it).
2. Use an app like CCleaner (www.piriform.com/ccleaner the free version) to wipe all vestiges of the programs from your registry.
3. Restart the system
4. Go to Sony and download new copies of the programs
5. Attempt to install again.
Installing driver 2.21 for the PDW-UI XDCAM drive can prevent Vegas from starting. Uninstalling the driver or upgrading to version 2.3 will resolve the issue.
1. Uninstall Vegas Pro (and DVD Architect if using it).
2. Use an app like CCleaner (www.piriform.com/ccleaner the free version) to wipe all vestiges of the programs from your registry.
3. Restart the system
4. Go to Sony and download new copies of the programs
5. Attempt to install again.