Slow download speeds, fast uploads

[coopermarsh]

I have a 2nd computer which is now experienceing very slow download speeds and normal upload speeds on its wired NIC.

The first time round I reinstalled the OS which worked, all back to normal.

However, I cannot do that, this time round.

Any suggestions why it has decieded to go slow

 

[hairlessupportmonkey]

Possible broken NIC drivers. Do you see this across the local network too?

Go into Device Manager, select the NIC, remove the device, but dont delete the Driver.

Hit refresh, allow the NIC to reinstall.


ACSS - SME
General Geek

 

[goombawaho]

Is it one computer or all?
If another computer is plugged into that network cable and jack, is it slow as well?

You have to look at all the pieces from the computer back out to the internet: the network card, its drivers, the ethernet cable, the wiring from the jack to the patch panel, the patch cable, the switch and finally the ISP.

Easy pickins (in order):
Try updating network card driver
Swap out network cable from PC to wall jack
Swap out patch cable from patch panel to switch
Move patch cable to different switch port
Install an add-in network card.

If PC is attached to managed switch, make sure it's set to auto-negotiate to start with and look for errors on the port.

 

[DrB0b]

Or broken NIC. Considering how cheap and readily available they are, if you cant easily remedy it with a new/udated/refreshed driver, I would go the new route. If you play with computers at all you should have a couple of these lying around.

Learning - A never ending quest for knowledge usually attained by being thrown in a situation and told to fix it NOW.

 

[coopermarsh]

I have around 160 machines this is the 2nd one to go slow.

A rebuild fixed the first one. I can use another PC on the same cable/port without an issue. I have attached a wifi dongle and the download speeds are fine.

I am left scratching my head.

 

[rclarke250]

What is the make and model? have you checked with the manufacturer? There may be a bios update with new code for the network chip.

 

[coopermarsh]

That's the other strange one.

The first issue was a dell E5420 the PC now with the issue is HP z400 workstation.

 

[goombawaho]

The first issue was a dell E5420 the PC now with the issue is HP z400 workstation.

Disregard computer brand/model. If the NICs are similar, that's the important thing. Or you have a switch going bad.

All my troubleshooting steps still apply.

 

[hairlessupportmonkey]

Also a corrupt ARP table in your network switch can cause silly things too.

ACSS - SME
General Geek

 

[cdogg]

I can use another PC on the same cable/port without an issue.

Most likely, this is a problem within the OS. Just for sh*ts and giggles, create a new user with admin rights and log into that account. Do you still have the issue? What version of Windows are you running?

-Carl
"The glass is neither half-full nor half-empty: it's twice as big as it needs to be."

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