Samsung Galaxy S8 Active lost internet connectivity for PC through router

I have a Samsung Galaxy S8 Active (SM-G892A) runnng Android 7.0. When I connect it to my PC (an HP Z240 Tower Workstation) running Windows 7 Pro, I lose internet connectivity for that computer through my router. Why is that happening? What can I do to fix it?
I imagine re-setting the router might very well fix it, but can I stop if from happening again?

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