I've been using Vegas Pro 13 for a long time now, and didn't have any problems with it. I recently updated windows 10 to the so called "Creator's update" which broke vegas completely for me. My friend's vegas pro 13 works fine with the windows creator update. I've tried holding control and shift when starting vegas to delete all cached application data but nothing worked. It seems that "d3d9.dll" is causing the problems. BUT, that doesn't make sense since DirectX 9 games such as Half Life 2 work just fine. Here are my system specs(NOTE: i know i have a slow CPU, but that will be replaced with a Ryzen 1500X soon) CPU: Intel Core 2 Quad Q6700 Overclocked to 3GHz, MSI GeForce GTX 1050 Gaming X 2G, 8GB DDR2 900MHz RAM, Asus P5QL Pro Motherboard, Spire SP-ATX-600W PSU, 120GB Samsung 750 Evo SSD(windows drive), 2TB Hitachi 7200RPM HDD(games drive). Both windows and Vegas Pro 13 are installed on the same drive(SSD)