Recently Purchased MT3000 slow VPN speeds only using Windows?

I recently purchased a MT3000 and it is wonderful, on my iPhone I receive speeds of up to 150mbps using Nord OpenVPN config. However, on my laptop and desktop I receive speeds of only 10-15mbps. Is there soomething I need to change with my computer or router to get it to work better with them? I am not savvy so please bear with me. Any help would be greatly appreciated thanks guys.

Are you connecting via WIFI? Can you get higher speeds if you use a cable connection?