Tak jedině se poradit se "strýčkem", najde docela dost řešení...

Removing Citrix DNE Lightweight Filter service from my network adapter solved the problem for me.

nebo

Run Settings > Network & Internet > Change adapter options
Right-click your network adapter and select Properties
Click Configure
Click Advanced
Click "Large Send Offload (IPv4)"
Set to Disabled
Click OK
Reboot might be required.