Troubleshooting why only wife's PC disconnects

For some reason when all five of us are playing, it is only my wife’s PC that disconnects every hour or two, sometimes more often. And it is only from World of Warcraft, while discord continues working.

She even has service priority in the router. Updated to latest drivers for motherboard, using short wired connection directly to router, pc firewall disabled, and gaming favoured on the C3150 modem. Followed all steps in the connection troubleshooting guide here.

There is no spike in Internet usage that I could see or any other oddity, but pretty please I would love any guidance on what to look for and how to test further, as it’s sporadic and takes time to replicate rather than circumstance.

Setup is as follows:

Five PCs playing the game.

Three PCs wired to an older router at the back of the house (modem serving as wireless repeater) which is connected by cable to the main router at front of house.

One PC at back of house on wifi.

Wife’s PC at front of house, connected with short cable directly into the primary router.

Primary router is Archer C3150. Internet service is NBN HFC 100Mbps/20Mbps unlimited data.

Don’t worry I’m having the same issue.

Are you running multiple pcs as well and finding it to affect just one of them?

I need to be doing something to try and troubleshoot this as we only play when my wife is on, and she’s le sad panda

At least we don’t all get immediately kicked out of a dungeon when this happens, unlike many years ago.

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Have you tried a different cable?
Are her network card driver’s up to date?
Have you tried turning off gaming priority?

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Started with her not having gaming priority. Enabling it hasn’t stopped the issues.

Got the latest Intel LAN drivers from ASUS, it’s one of the ASUS Maximus boards from last few years.

Only happens to World of Warcraft. Never happened in Battlefield, Minecraft or other online games tried.

Hmm. She was in Port 3 of the router, after both TV and the connection to the kids. I’ll try swapping her to port 1 which is often the priority/gaming port on routers. And I’ll try another cable if that fails.

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I’d second the recommendation of trying a different cable.

Also, you mention that you have the ASUS drivers installed for the onboard NIC (Intel). It might be worth nuking those and using the drivers straight from Intel. Just be sure to download the drivers from Intel on her computer before nuking the ASUS ones, or it’ll require a flash drive.