It’s simple, it’s easy.

Go to the start menu, Accessories. Right click on Command prompt, and hit run as administrator.

Type:

netsh winsock reset

then type exit
and restart your PC. iTunes will no longer suck 50% CPU and Apple Device the other 50% CPU.

Worked like a charm. It was just finding it that was the problem.

YOU DO NOT NEED TO DELETE OLD BACKUPS OR ANYTHING LIKE THAT. THIS IS THE UNDERLYING CAUSE.