Why the connection is so slow?

[burekas]

Hi,

I'm trying to connect to a PC from my laptop, but the connection is so slow.
I even set it with low quality (even with black-white display) for high speed, but it's still very very slow.
My laptop has Win10 Home, Teamviewer 11, the other PC has Win7 also Teamviewer 11.
I check the Internet speed and it's ok.

What could be the reason?
Please help.

Thanks.