What does it mean when I get a notice that another computer on this net work has the "....same IP address as this computer."?

It means that you are using a dynamic IP address. The IP (internet protocol) address is a number that identifies each device on the network. Most devices use dynamic IP addresses, which are assigned by the network when they connect. These IP addresses are temporary, and can change over time.

There are several ways to resolve an IP address conflict. Since you are running Windows, this link might help you. You may also want to check your router for software or firmware updates.

If you are not that technically savvy, you may want to get tech support either from your Internet provider or your router manufacturer.

K. Thanks.

Short answer: Turn off all your devices and unplug the router. Turn them back on. 95% chance of solving your problem.

Long Answer:

Your WiFi router assigns a unique IP address to every device on the network. That’s how the router keeps track of everybody:
“User A Googled ‘Taylor Swift’”
“User B is watching a Youtube video”
“User C is shopping on Amazon”.

You have only one Internet connection. Your router routes (sends) the Google and Youtube and Amazon info to the right device. Thus the name “router”.

Anyway, turn off all the devices and unplug the router. Turn them back on.

95% chance that new unique addresses will be assigned and your problem is solved.

Cool beans @jaytkay. Thanks.