Okay try this please:
Open Device Manager by right clicking on the windows icon on the bottom left of your screen.
Double click on Network Adapters.
Right click on WAN Miniport (IP), WAN Miniport(IPv6) and WAN Miniport (PPTP) and choose uninstall.
At the top of the window choose Action tab > Scan for hardware changes.
The adapters you just uninstalled should come back
Restart your system