Problem is Cakewalk was working fine - then all of a sudden it will not open.
Equipment: Dell desktop with Windows 10 Pro 64bit
CAUSE: In my case it was corrupted creative soundblaster Z driver - or possibly a ##@&G@! microsoft update!
SOLUTION:
1. I uninstalled all Creative SOFTWARE
2. I shut down computer and REMOVED the PCI-E sound card - restarted - then shut down again.
3. I reinstalled the sound card & restarted computer
4. Still had original Crative install CD - installed all driver and software.
5. Cakewalk opened again!!