Windows – why only download is slow but upload is fast on the computer

networkingperformancewindows 7

I'm confused about a network problem on my PC. It hasn't had a problem before but suddenly its happening often since a week ago.

I tested the Internet speed at speedtest.net. My environment is:

  • OS: Windows 10 Pro
  • Network bandwidth: 100Mbps (LAN not wireless)
  • Average speed before problem: at least 85Mbps

When you see the screenshot you can see there is no overhead on my network status at testing time in the resource monitor.

enter image description here

But why is the download speed slow?

I've tried several methods to fix it including:

  1. Reboot PC and Switch
  2. Unplug LAN wire then plug back in
  3. Disable/Enable NIC
  4. Update NIC Driver
  5. Configure NIC again (IP, subnet, gateway)

If you have any ideas on how to fix this please let me know.

I also wonder this; I've never tweaked the system or even used a system optimization tool.

Best Answer

There could be multiple reasons for this. It could be a configuration issue on your computer, it could be a router problem or it could be a network problem with your ISP. You should start by trying the same network with a different computer. If the other computer also has the same speed next step is to try resetting your router or checking router configurations. If that doesn't work you could contact your ISP and have them check their part.

Related Question