1
Most likely there is a problem with the network drivers on your PC and they need to be re-installed, do you normally use a WiFi or wired Ethernet connection?
2
Right click your Start Button and open Device Manager.
Expand the Network Adapters section, please provide a screenshot of that window.
3
Click your Start Button, then just type msinfo and press Enter, please provide a screenshot of the resulting System Infomration window.