I’ve had this problem for a few weeks now, where I have no internet problems while browsing and watching videos/streams, but when I log into WoW I instantly get disconnected from the internet completely. If I run the network troubleshoot program, it complains about “default gateway is not available” and/or “Ethernet does not have a valid IP configuration”. Sometimes my computer freezes and crashes while running the troubleshoot tool, but usually troubleshoot manages to fix the problem(s).
All the drivers were up to date, but I uninstalled and reinstalled them anyway, in case that was the problem. (and by all, I mean graphics, network etc. Everything).
After the first disconnect I’m usually able to play for a few hours without problems, unless I make the mistake of opening a browser at the same time and entering a site like Netflix or HBO. Instant disconnect.
I run Windows 10, I don’t have a router or wifi, I just plug the cable straight into a wall.
Anyone had similar issues, or have a clue what might be causing this?
My next step will be switching from Windows to Linux to see if that does anything. I’m starting to lose hope, and google doesn’t really offer any answers.
Are you using a VPN?
Is WoW exceptioned in your Security ware?
Ports open?
You’re best bet is Tech Support, not CS
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It got moved to TS.
I’m curious about your networking setup. I’ve seen situations in which an old and “worn out” router basically breaks down under load, and WoW puts a bit of a load on a router.
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Just to compile details:
Problem
- when I log into WoW I instantly get disconnected from the internet completely[1]
- after reconnection, the connection is fine until “I make the mistake of opening a browser at the same time and entering a site like Netflix or HBO”
- Issue started a few weeks ago
Configuration
- No router or wireless access point, PC is connected “straight into a wall”[2]
- Windows 10
Troubleshooting
-
“default gateway is not available” and/or “Ethernet does not have a valid IP configuration” error messages running troubleshooter tool
- Sometimes my computer freezes and crashes while running the troubleshoot tool
- Graphics & network drivers up to date
[1] Just to clarify - this disconnection happens regardless of what you are or aren’t running, or it happens only when you have a stream or video open?
[2] I’m a bit curious about this - can you provide any more details about your connection?
Is this the type of internet that’s offered through your apartment complex? Or College dorm?
There is definitely a router somewhere downstream. The wire in your wall goes ultimately a router that represents the “boundary” between your network and the Internet. There may be other network components involved between your wall and the router, as well.
If any of them are having trouble with the traffic imposed by WoW, they could be the source of the problem.
I’m not using a VPN, wow is on the list of accepted applications in windows security/firewall.
I’m a complete newbie with computers, but found a site where I can check if a port is open or closed. For port 3724 which is for wow traffic (at least according to google), it says the port is closed. I have no clue if that’s good or bad.
The cable goes into a socket on the wall, and I have an electric closet in the hallway where the fiber optic sockets are located. In there, I can choose to have internet in only that one socket I’m currently using, or I could add a router/wifi in there to share the connection to other sockets in my apartment (I have tried all of them, and I’ve tried adding a router/wifi, but no change). It’s an apartment complex with 100mbps for each resident individually.
Power cycling the modem and router would be the best bet. But if it’s one of those I mention, my kid had that type of connection like 14 years ago, flushing the DNS might help when it happens.
I’ve tried the flushdns command too, but it doesn’t seem to help. 
I have a tech support friend, and we’ve tried pretty much everything. A while ago I had worse issues (I kept disconnecting every 2-30mins) and he suggested the problem might have been my motherboard, so I bought a network card to see if it would help. Everything worked perfectly for a month or so after adding the network card, but now the problems have started again - albeit it’s not as bad as it used to be before, and this time it’s not just random DCs, because the DCs only happen when I open an online game.
I don’t know what to tell you. One of the first, most basic, steps is to power cycle the router and modem. Which you don’t have access to.
I’d contact your management and see if they can put you in contact with the provider’s tech support. THEY can power cycle it remotely ( won’t your neighbors be pleased 
)
Thanks!
I guess I need to give them a call. Hopefully they can do something about it, because I’m starting to lose my mind with this. x_x
Did you ever find a solution for this? Im having the exact same issue, wow disconnects my wifi and I have to manually reconnect. Opening a web page behind wow also causes it to disconnect. I just started having this problem a few weeks ago, no issues before that.
So strange, I actually think I am having a similar issue. Open browser and my internet immediately shuts off…
I think I’ve seen an issue like this in the past and it eventually led me to replace my modem. The cause seemed to be that WOW forced certain voltages on my upstream and downstream to go past their safe ranges, causing the modem to reset itself. Bringing the entire network in my home down. This could be an ISP-related issue they can fix outside your home, or it may be an old or damaged modem. In my case my modem was relatively new, but had an issue related to a power surge that damaged it and the voltages weren’t handled correctly. You should be able to log into your modem directly and look at the error codes to see if you’re experiencing something similar. Hope that helps.
UPDATE:
So, it turns out I was just stupid.
I did pretty much EVERYTHING imaginable, including buying a new ethernet cable that goes from my computer to the wall.
But what I failed to realize was that I never changed the cable that is plugged in the main cabinet with all the fuses and whatnot. There’s an internet cable there that had been plugged in since I moved into this apartment 5 years ago, and for some reason I -thought- it’s some kind of special cable that shouldn’t be touched… >.>
Well, I switched it to a new one and all the issues are gone.
TL;DR If you experience similar issues and updating drivers doesn’t help, then just change all your ethernet cables, even if they look brand new. 
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