I have a 1 Mbps internet connection through a router. My PC (running Windows 10) is connected to the router via Ethernet. When I download something at high speed (>10MBps or so), the connection drops, and I get an exclamation mark on the network icon, which says "there was a problem assigning an ip" or something like that. It will not reconnect itself.
The easiest fix I've found is to enter sleep mode, then wake it.
The problem appears only on this PC, and there's no problem with the internet connection on the other network devices.
Where should I start troubleshooting this?