I'm not sure if this is the same thing but my (ancient) desktop has been having issues for a while- around when WW v5 started if I'm remembering right. It'll connect for a moment and then lose the internet again even though it's a wired network and that shouldn't be happening- everyone else in the household is fine, as is the wifi (on my laptop at the moment). I've been baffled by it as has my dad (works most of the computer things in the house- redid the network adapter, got a new wire, etc. still busted). This sounds very similar to my situation with my old desktop- though I thought it was just getting old. I don't know if it's related!