at is the make and specific model of your router (the device between the source of your Internet connection and your computer)?
Lack of IPv6 connectivity is not be a problem for the vast majority of home Internet users.
On the problem computer, open a Command Prompt window (click Start, type Command Prompt in the Search box, and press Enter).
Type the following in the black Command Prompt window and press Enter
ping 142.251.40.174
You can also try
ping 8.8.8.8
ping 8.8.4.4
The first address is one of Google's main servers; that address worked today, but may be turned off for reasons known only to Google. The latter two are Google's public DNS servers and should always be available, although the first ping for either of those will take longer.
Other than the times (7 ms and a TTL of 55), you should see something essentially the same as the following. If you see anything other than "0% loss" in the highlighted line, please report exactly what you do see when you press Enter.
Still in the black Command Prompt window, type the following and press Enter
ipconfig /all
You should see something like the following. Most of the sections will say "Media disconnected," but there should be at least one section that is populated. In the screenshot below, that one is
"Ethernet adapter Local Area Connection."
In the populated section, what are the entries you have for:
- IPv4 Address
- Default Gateway
- DHCP Enabled
- DHCP Server
- DNS Servers