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1. In the search box on the taskbar, type Command prompt, press and hold (or right-click) Command prompt, and then select Run as administrator > Yes.

2. At the command prompt, run the following commands in the listed order, and then check to see if that fixes your connection problem:

• Type netsh winsock reset and press Enter.
• Type netsh int ip reset and press Enter.
• Type ipconfig /release and press Enter.
• Type ipconfig /renew and press Enter.
• Type ipconfig /flushdns and press Enter.

Close command Prompt and hopefully you WiFi / Ethernet is working OK again.

netsh winsock reset netsh int ip reset ipconfig /release ipconfig /renew ipconfig /flushdns