PC Wifi Drops Connection For 1-2 Seconds

Hello all,

I'm at something of a loss after a couple of days of trawling through various forums and google searches, so figured I would finally post and see if anyone had any ideas. The problem I'm having started two days ago (No, I hadn't made any system changes beforehand, no installs, downloads, etc) in that every few minutes or so, my internet will drop. It's only ever briefly, perhaps for a max of five seconds. Unfortunately this is more than enough to interrupt nearly anything I'm doing, barring generic web surfing where I can simply wait it out. It is incredibly obnoxious.

I am on a wireless connection, and on my desktop PC. My modem is an Arris TG1672G. My adapter is a Qualcomm Atheros 802.11 a/b/g/n Dualband Wireless Network Module, as well as a Realtek RTL8191SU Wireless LAN 802.11n USB 2.0 that I used previously. (The latter was the one I was using when the issue started, but I switched to the former to see if it helped - it didn't)

I've switched modem channel (And switched it off of the auto it was set to in the mean time), I've switched band from 2.4 to 5ghz, I've updated the drivers of my adapters and made sure the firmware on the modem was up to date. I've done an ipconfig /release /renew, I've installed windows updates. I've power cycled the modem and my computer. I've turned off the modem firewall, and just in case double checked all of the power settings in regards to my computer possibly shutting it off. I lowered the beacon intervals, and the RTS and fragmentation thresholds.

I'm running the modem in WPA2-Personel and AES encryption. I even tried switching the DNS servers and using a different browser for funsies, just in case. Unfortunately I can't wire the connection to see if that helps, but no one else on the network is reporting problems. At any given time there is at least three computers connected, one tablet, and a couple of cellphones. The modem itself is through several rooms, walls, and devices - but as the problem didn't start until two days ago, and nothing has changed in regards to that I can't imagine interference is the problem. I've also ran TCPOtimizer, and done extensive virus/spyware scans.

More than likely I'm forgetting a few things, but I basically tossed everything I could at it to see if it would work - so far, no dice. I'm not sure what else I can try, or what information I can provide that would be useful. The only unusual error that shows up in the modem event log is:

2015-07-08 14:54:59.00 Dropped FORWARD packet: SOURCE IP=2607:f8b0:4002:0c06:0000:0000:0000:005e DESTINATION IP=2605:6000:89c0:0100:fc72:372f:8b10:0e5f PROTOCOL=TCP

But I don't know if that's helpful at all. Any advice or tips to try would be helpful.

Thank you for your time.

first we need to determine if the issue is with your local network or your internet connection.
open a command prompt and run ipconfig
look for the default gateway. most likely its going to be 192.168.0.1 or something like that
then run the following command (substitute 192.168.0.1 with your own number, i am just using it as an example):
ping 192.168.0.1 -t
let it run for a few minutes and press ctrl+c to stop it, then look for lost packets % at the end
this will tell us if connection between your computer and modem is good.
then run ping www.google.com -t
this will tell us if the connection between your computer and the outside world is good.

Click to expand...

Hey! Thank you for your response.

I did as you asked, and I ran both ping tests for several minutes each - long enough to see what it did through one of the two second disconnects, particularly. In the case of the first, computer to modem, I received 0% packet loss. In the case of the second, I received 4% packet loss. That was received during the two seconds or so the internet was off before it fixed itself, and the errors it gave me were 'Request timed out. Request timed out. General failure. General failure.' Then it continued along, with the reply from the one directly under the errors taking 504ms. Pinging my IP didn't seem to detect anything, even during the period the internet went down.