Sometimes works, usually doesn't

Making me crazy. I’ve had iC Pro for awhile, and it used to load every time. Now it doesn’t. When I open it, it shows the name of my computer. Tries to load, but does not. Just grinds away. When I give up and put my IP address in, it doesn’t work either.

I’ve tried loading Cubase first, then iC Pro. iC Pro first, then Cubase. Nothing works.

But, then, once every few times, it’ll suddenly work.

Cubase Pro 8. Windows 10. iPad Air 2.

Any suggestions? Is it a router problem?

Do I need to create a Homegroup?