Try this you might have old settings on the pc from your previous isp.
Windows 10 TCP/IP Reset
WiFi adapter sees available network, however will not accept tcp/ip address. Attempting to reset winsock and ip stack may resolve the problem. Note, this information is one of many possible solutions that should only be attempted if you have a good working knowledge of the Windows OS network settings and services.
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.
For a complete list of Windows 10 network troubleshooting see https://support.microsoft.com/en-us/...nection-issues