Windows 10: Uploading files slows down when connected through ethernet port

Whenever I am trying to upload a file to tax portals the file transfer slows down and stops when the upload is about 60~90% complete when I am connected to the modem/router through wired ethernet port. But when I am connected to the modem/router wirelessly, the upload is quick. What must be the reason? I am using Windows 10 Pro 64 bit. I tried resetting winsock, network settings etc. but it doesn't help.

:)

 

Slow download speed fast upload on Ethernet.

Hello,

A faulty Ethernet port can be one of the factors why this issue occurs. To isolate your concern, if available, we suggest that you try to use a
USB Ethernet adapter and check if the issue persists.

Meanwhile, we suggest that you follow the additional troubleshooting steps provided on this
link to help us fix the issue that your experiencing
using hardwired connection.

Give us an update with the outcome.

 

Cannot connect to ethernet no valid ip configuration

We appreciate the information you've provided. We'd like to confirm the results after following the steps on the link provided on our previous post.

Meanwhile, to isolate your concern, we suggest that you check the following:

• 
  If the Ethernet port is clean.
  
• 
  If the end of RJ45 (Ethernet cord) is still intact.
  
• 
  If available, test the RJ45 (Ethernet cord) to your other device and check if issue persists.
  

We look forward to your reply so we can assist you further.

 

Ethernet connection/port on my laptop

Thanks for the suggested solution which I tried. My feedback:

• Update download was completed but installation did not complete and the message popped up that stated that update is not compatible and cannot be installed.

Info sought in your mail is as follows:

• Which build and edition of Windows 10 is installed on your computer?
  • Window 10 Pro
  • Version 1709
  • OS Build 16299.192
• What is the make and model of your laptop?
  • Dell Alienware
  • 15" Laptop
  • System 64 bit os x64-based processor
• Are you experiencing the same issue even when you are using another Ethernet cable?
  • yes, tried different cables
  • (also same ethernet cable & connection works on my mac notebook)
• Have you made any changes to your computer setting before this issue occurred?
  • Can't say with certainty about changes, if any, made. Normally i don't fiddle with the laptop systems.
  • ethernet port was working just fine and suddenly became dsysfunctional about two weeks back.
  • Checked Network adapters in the device manager which highlights Killer E2200 Gigabit Ethernet Controller with a yellow mark. Also checked network adapter driver which states that installed driver is the latest.