Sky Go: Videos hang on the laptop. What to do?

So
1

When I watch a series (on demand) on the laptop, the picture (never the sound!) Often hangs every few seconds and that annoys and annoys me a lot. (It never hangs on the cell phone!) I've read what it can be, but it doesn't help me. It may be due to the internet connection, but it is okay; or that the laptop is not connected to the power supply, but it is also not the case. It also said: "Also ensures that neither the firewall nor an anti-virus scanner are preventing the Sky Go stream from being transmitted properly." But no idea how to check it out. Annoying everything. Even downloading an episode doesn't help, although the internet doesn't matter! The laptop is actually able to play HD content. Why is nothing hanging when I watch YT?

Da

I can't even get into Sky Go because I don't have a password. Sky says go to Telekom, Telekom says: Go to Sky because I booked Sky via Telekom…