Yes, 3DCAM will run on Windows 7, 8 and 10. It will run on 32bit or 64bit machines quite happily.
What problems are you having ?
3DCAM does require that it be run as an administrator, to accomplish this.
Right click the 3DCAM desktop icon and choose Properties > Compatibilty > Run as administrator.
You will only need to do this once.
Please contact me if you have issues andre@dolphincadcam.com
ATB
Andre