Just built a computer with an i7-8700k, 1070ti, and 16 GB RAM. All the drivers have been updated as well as the bios. Everything is updated and rebuilt it 2x to ensure that there wasn't a physical issue. My friend and I are stuck at a standstill not knowing what to or how to fix the issue of the lagging cursor and the internet not working. When we updated the LAN drivers the internet was perfect.... for like 5 minutes. Every time we restart it, it'll work smoothly for a few minutes then stop working properly.