PC Specific LAN issues suddenly occured

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whitelaw14

Reputable
Aug 8, 2014
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4,510
Hi,

There is something wrong with my internet on my PC.

It started when I took it to my friends house. Despite him having a fiber optic fast connection when I hooked my PC up to the router via his Ethernet cable I was getting very low speeds. Between 65-120kb/s on origin and steam, terrible torrent speeds and streaming and general web use also badly affected in all browsers. His laptop worked fine the whole night.

The problem then followed me home, I have hooked up back to my original Ethernet cable plugged direct into a different router and all of the above continues to happen. Despite my laptop, phone etc all working at normal speeds.

I have scanned with windows defender and malwarebytes and no issues where detected. Seen as this has happened at two separate houses on two different connections and two different Ethernet cables I suspect a hardware fault on my LAN port. Is it possible that this would allow some data through but at very slow speeds, and this could have been caused by moving my PC? Windows detects no problems with the hardware or the connection.

Is this feasible and the probable cause, is there any troubleshooting I can try before buying a USB LAN port to test this way.

Your help in this matter would be greatly appreciated.

Many Thanks in advance

Mike
 
Solution
ronintexas
It looks like your hardware is fine.

Your DNS could be messed up - to clear it, on a command prompt (with administrator privileges) type "ipconfig /flushdns" (without quotes).

Second thing I would check is what your DNS servers are set to - make sure they are the same as the other computers on the network.

Is the problem browser dependent?

Could the issue be related to new anti-virus/malware software recently installed?

Also - trying pinging www.yahoo.com and a few other websites - what are the rates there? Local pings should be 2-30ms on average, and internet pings should be 20ms - 100ms. A really good network and internet connection is on the low end of those scales. You might also want to compare them to others on the...
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whitelaw14

Reputable
Aug 8, 2014
4
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4,510


Thanks for the quick reply Ron. I am not showing as limited connection.

My IPV4 Connectivity says Internet whereas IPV6 Connectivity says No internet Access. I don't know if this has changed or whether it has always been that way. I am not very savvy when it comes to networks.

My laptop still sees my computer as being on the network and last time I checked I could access files in my shared folder.
 
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ronintexas

ronintexas

Judicious
Dec 10, 2012
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If you can access your local computers at a decent speed (try a file transfer), there may be an issue with the firewall. IP V4 showing "internet" indicates that you have successfully negotiated a connection to the local network.

Next steps would be ping times between computers on the network, the gateway, etc....and I would also verify that the IP V4 settings are the same (if automatic) as the other computers on the network.
 
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whitelaw14

Reputable
Aug 8, 2014
4
0
4,510


Hi Ron,

Sorry for the late reply I have been at work.

So a file transfer works fine between the affected pc and my laptop, did a 1 GB file in about a 1.5 minutes which was the typical before the problem started.

Pinged my laptop through cmd and my average was 9ms - minimum being 2ms and maximum 33 ms.

Pinged my gateway and <1 ms also.

Everything in the description of my IPv4 details are the same bar physical address and IP address which I understand is normal. Still stumped as to what this could be.

Does the above point to configuration issues. What type of firewall issues can be allowing me to have internet but at such slow speeds? Anyone who has any input it would be greatly appreciated.

Again thanks in advance.
 
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ronintexas

ronintexas

Judicious
Dec 10, 2012
5,911
0
32,960
It looks like your hardware is fine.

Your DNS could be messed up - to clear it, on a command prompt (with administrator privileges) type "ipconfig /flushdns" (without quotes).

Second thing I would check is what your DNS servers are set to - make sure they are the same as the other computers on the network.

Is the problem browser dependent?

Could the issue be related to new anti-virus/malware software recently installed?

Also - trying pinging www.yahoo.com and a few other websites - what are the rates there? Local pings should be 2-30ms on average, and internet pings should be 20ms - 100ms. A really good network and internet connection is on the low end of those scales. You might also want to compare them to others on the network.

Last thing - Do you have any network programs loaded that "shape" or "speed up" the internet? I have an ASROCK Z77 Extreme 3 mobo that came with programs that did that - which actually resulted in slower speeds on regular internet surfing (It did speed up things I did most often). After uninstalling those drivers - speed is up to normal.
 
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