Joining this thread that goes back 3 years. It's frustrating to see that there really hasn't been a solution.
I've been going along just fine since I've had xfinity about 2 years. November 2017 is as far back as the data usage meter goes for me, and that was a big month for some reason, about 700gb. Since then, I've averaged between 100 and 400gb per month. All of a sudden, I'm at 1084gb with 5 days left of the month. Since I got the notice on the 23rd, I've somehow burned through about 60gb of data.
I called. Did the whole "change the password and hide the network" thing. I renamed all the devices connected to the network so I know what they are when I look at the router's connected devices (I'm using my own Netgear C3700 gateway as modem/router). I've done SEVEN various virus/malware/etc scans on the two laptops that are in the house:
Norton (that comes with the xfinity account)
Spybot Search and Destroy
Norton Power Eraser
Eset's online scanner
Trojan Remover (as mentioned earlier in this thread)
I've also done an F-secure scan on the router as well as various port scans.
All of these things found nothing.
I've installed Networx on the 2 laptops, and there's nothing out of the ordinary there, and since I've installed it on my laptop on May 24, it hasn't even used 1gb yet. I only installed it on my wife's laptop yesterday, and the data usage is minimal.
We've been watching stuff on firestick and on our smart tv, which of course would use the internet, but I don't think that would be at the rate of 15gb per day. The firestick has data reporting functionality, which has less than 5 gb used total. I don't know if there's a way to check the data use of the smart tv, which we use for prime video/netflix, I'm still looking into that.
Using WindowsKey+i on the laptops shows "normal" usage as well, nothing that gets anywhere near the usage being reported on the xfinity data meter.
Sure, we have our phones and tablets connected to the wifi when we're home. But if they were the problem, our Verizon data would also be flying away, and it's not. And we don't use the xfinity hot spots.
I know not all virus/malware scanners catch everything. And I know that maybe bots would sit in the background and maybe not be caught by these data analysis programs (or would they?). But the fact that I've done several various tests makes me think it's not on our side.
So, anyone want to take a crack at this one? :-Þ
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