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My Computer Slows The Network When Connected To It Via Wifi


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#1 Jitterbug28

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Posted 12 July 2017 - 10:49 PM

My computer in my room connects via wifi with the wifi extender about five meters away and the router about 10 meters away. When my computer is off, internet is fine. When my computer is on and connects to the network, thats when the internet and all devices connected to it slow way down. Occasionally its ok which drives me insane. i got my computer brand new  just last November. Steam game updates shows a very inconsistent download rate and task manager's wifi performance shows similar results (sign-wave wise).

 

Specs

Processor: Intel® Core™ i5-6500 CPU @ 3.20GHz 3.20GHz

 

Installed Memory (RAM) 8.00 GB

 

System Type: 64-bit Operating System, x64-based processor

 

Things ive tried;

- Testing wifi signal strength by using my android in the same room my computers in. Internet speed was around 7 Mbps (which is good for this household) but then drops down to around 2 Mbps when i turn on my computer

 

- Replaced and upgraded my wifi adaptor to Broadcom  802.11ac

 

- Ethernet connection makes no difference

 

- Works fine on other networks (friend's house and had it looked at under warranty)

 

- CMD commands such as dns flsuhes and winsock resets

 

- Modem restart

 

- Scanned for viruses (Malware Bytes, Trend Micro and windows defender)

 

- Calling internet provider

 

- Replaced modem

 

Any help would be much appreciated. Thanks in advance


Edited by Jitterbug28, 12 July 2017 - 11:10 PM.


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#2 jwoods301

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Posted 12 July 2017 - 11:56 PM

What router are you using?

 

Is the firmware up to date?

 

Post screenshots of the wireless configuration on the router (black out any passwords).

 

I would also download and run the free Wi-Fi Scanner from Lizard Systems...

 

https://lizardsystems.com/wi-fi-scanner/index.php



#3 Jitterbug28

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Posted 13 July 2017 - 12:33 AM

 NETGEAR D6200 Firmware Version V1.1.00.20_1.00.20

 
    Wireless Network (2.4GHz b/g/n) Name (SSID): Channel: Auto01020304050607080910111213 Mode: Up to 54 MbpsUp to 145 MbpsUp to 300 Mbps Enable SSID Broadcast (ticked) Enable Wireless Isolation

Security Options None WPA2-PSK [AES] (ticked) WPA-PSK [TKIP] + WPA2-PSK [AES] WPA/WPA2 Enterprise Wireless Network (5GHz a/n/ac) Name (SSID): Channel: 36404448149153157161 Mode: Up to 54 MbpsUp to 173 MbpsUp to 400 MbpsUp to 867 Mbps Enable SSID Broadcast (ticked)

Enable Wireless Isolation

 

Security Options None WPA2-PSK [AES] (ticked) WPA-PSK [TKIP] + WPA2-PSK [AES] WPA/WPA2 Enterprise

 

Wasnt sure how to attach file so just copied and pasted. It wont show where its checked so i just added "(ticked)"

Ill give that Lizard system a crack aswell, cheers for fast reply

 

Didnt lay it out as i thought it would, sorry for the messyness :/


Edited by Jitterbug28, 13 July 2017 - 12:34 AM.


#4 jwoods301

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Posted 13 July 2017 - 12:36 AM

What channels are you using on 2.4? on 5?



#5 Jitterbug28

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Posted 13 July 2017 - 12:36 AM

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#6 jwoods301

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Posted 13 July 2017 - 12:41 AM

Take 2.4 off of Auto and use either 1, 6, or 11

 

See how many of your neighbors are on those channels at peak times before deciding which one to use. Wi-Fi Scanner will help with that.

 

Try either channel 149 or 157 on the higher band for 5.


Edited by jwoods301, 13 July 2017 - 12:41 AM.


#7 Jitterbug28

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Posted 13 July 2017 - 12:57 AM

Ive tried that, didnt make any difference. I dont think its the channel because my phone gets a really good signal and 7 Mbps at my (problem) computer's location when said computer is turned off



#8 jwoods301

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Posted 13 July 2017 - 01:08 AM

Could be your wireless adapter or internal wireless antenna.



#9 Jitterbug28

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Posted 13 July 2017 - 01:22 AM

I got the wireless adapter upgraded and works fine on other networks such as my friend's house. Such a weird and frustrating problem..



#10 jwoods301

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Posted 13 July 2017 - 01:30 AM

Does your phone connect on 2.4 or 5?

 

What do you normally connect on?

 

Any differences if you connect on 2.4 or 5?

 

Could even be a bug in the stock (Netgear) router firmware.

 

You might check if the D6200 can use 3rd party firmware.

 

https://www.myopenrouter.com/netgear-opensource-central


Edited by jwoods301, 13 July 2017 - 01:43 AM.


#11 Jitterbug28

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Posted 13 July 2017 - 01:45 AM

My phone connects to the 2.4 (extender) and the computer i normally connect also onto 2.4 (extender) but switch often to try to improve the connection when it disconnects, mostly have trouble connecting to 5. It seems that usually the 2.4 gives a stronger connection and better for streaming whilst the 5 gives better ping (atleast used to) when playing online games such as Dota

 

Also may help to point out that when i tried an ethernet connection a while back, still didnt improve


Edited by Jitterbug28, 13 July 2017 - 01:46 AM.


#12 jwoods301

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Posted 13 July 2017 - 01:48 AM

Good article on when to use what...

 

https://www.howtogeek.com/222249/whats-the-difference-between-2.4-ghz-and-5-ghz-wi-fi-and-which-should-you-use/

 

Extenders can also drag a network down if they are not placed correctly.

 

Location is important.


Edited by jwoods301, 13 July 2017 - 01:57 AM.


#13 jwoods301

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Posted 13 July 2017 - 02:08 AM

Also may help to point out that when i tried an ethernet connection a while back, still didnt improve

It does.

 

Taking wireless and extenders out of the equation, it looks more and more like the router configuration or firmware.



#14 Jitterbug28

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Posted 13 July 2017 - 02:20 AM

All the things ive tried ive written down on the first post. Ive tried 3 different modems, 2 of which are good quality

#15 jwoods301

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Posted 13 July 2017 - 02:28 AM

All the things ive tried ive written down on the first post. Ive tried 3 different modems, 2 of which are good quality

So are you bridging the D6200 to a separate modem?






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