Creo versions: Creo 3.0 M130 / Creo 4.0 M020 and above
B&W products: all
Due to a bug in legacy versions of the Microsoft system library ucrtbase.dll Creo prohibits the start of B&W applications in rare cases since it maliciously considers the application not to be unlocked.
More information about this can be found in the following PTC article:
To update the ucrtbase.dll to the current version please click ‘Start’ > type ‘windows update’ > click ‘Check for updates’.
In case this is not successful on Windows 7 / 64 bits, you can also copy the attached ucrtbase in:
<creo_install_dir >/common files/x86e_win64/obj