Had a bad motherboard & swapped it for a brand new one. Though the program is listed in Programs & Features, Vegas Pro 13 will not open, even after uninstalling & re-installing from the hard disk. The program worked fine until the new motherboard was installed, so I am concluding that the problem would not be with drivers. I am using Windows 10 with a 64-bit system. Any suggestions would be greatly appreciated. Thank you.