@rcgldr 

Good day,

Thank you very much for your time and patience.

Have you tried to update the following driver to see if that helped:

https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-usb-3-0-software

if possible please try to change a different Ethernet cable just in case the cable is the problem.

And have you checked when the internet lost, what is the IP address on the computer?

Thank you~

@Kathy_Z - Updating the driver didn't make any difference. Turning off the Wi-Fi reduced the frequency of losing connection, but it is still occasionally lost. However, the speed is extremely slow, less than 15 Mbps, when it's 130+ Mbps when using Wi-Fi. The ethernet is running at 1 Gbps, and other computers connected via ethernet are seeing speed around 150 Mbps.

@rcgldr 

Good day.

Sorry for the delay.

In this way, we might need to follow up your case by email and please keep an eye of your message box.

At the same time, could you please help me check the following information:

1. What is the system info on your computer, such as https://www.tp-link.com/support/faq/2722/
2.  A picture of the link speed on the computer as well as the final speed test via www.speedtest.net ;

Thank you!

@Kathy_Z 

System info:

Dell Inspiron 15 7591 2-in-1

Internet speed test varied, usually 120 Mbps to 140 Mbps (which is the expected speed), occasionally less than 20 Mbps due to some issue.

I posted a question at Amazon, and at least one other person is having the same problem:

@rcgldr 

Good day.

Sorry for the delay.

Have you ever noticed when would the speed drop to less than 20m/s?

And at this moment, did you do something on the computer, such as gaming, live streaming or downloading large files?

When the speed slows down, what do you do to recover the speed, or would it get back to 120-130m/s automatically?

Thank you very much!

I have problem with loosing connection.

Ethernet card is disappering for a while in device manager so Internet is loosing on this time:

I have same version V1.

Windows 10 PRO 2004.

Laptop Dell Vostro 3560.

When same cable is connected to ethernet in laptop or in another USB Ethernet adapter Gembrird everything is ok.

Spped of connection is same on all ethernet cards.

It happens every 5 minutes...