When you have a disconnect on one of the Windows computers ...
Open a (black) Command Prompt window:
Hold the Windows logo key and press r; in the Run box type cmd and click on OK.
Type the following command:
IPCONFIG /ALL
[Note that there is no space between the slash and ALL.]
[Press ENTER after each command.]
Right click in the command window and choose Select All, then hit Enter.
Paste the results in a message here.
If necessary use a text file and removable media to copy the results to a computer with internet access.
Then check your router's WAN status. If it has lost its IP address, tell us that and see if the router's or modem's LED's give any good hints (differences from when you have internet access). If the WAN still has an IP configuration look at what the Gateway is. Then run the following tests in a Command Prompt just like you did the ipconfig /all:
ping <put the Gateway IP here>
ping 8.8.4.4
ping yahoo.com
Open a (black) Command Prompt window:
Hold the Windows logo key and press r; in the Run box type cmd and click on OK.
Type the following command:
IPCONFIG /ALL
[Note that there is no space between the slash and ALL.]
[Press ENTER after each command.]
Right click in the command window and choose Select All, then hit Enter.
Paste the results in a message here.
If necessary use a text file and removable media to copy the results to a computer with internet access.
Then check your router's WAN status. If it has lost its IP address, tell us that and see if the router's or modem's LED's give any good hints (differences from when you have internet access). If the WAN still has an IP configuration look at what the Gateway is. Then run the following tests in a Command Prompt just like you did the ipconfig /all:
ping <put the Gateway IP here>
ping 8.8.4.4
ping yahoo.com