Windows 10: Weird issue with cable modem, speed, and connection

I have an Arris cable modem from Spectrum. It has 4 ethernet out ports. For many months i've been running two ethernet cables out from it, 1 directly to my PC 3 feet away, and one to the router for the rest of the house.
reason: if i go to the router, then out from that to my PC, i get about 65 Mbps. If I ran direct from the modem to my PC, I always speedtest at my full 120 Mbps. I gave up trying to figure out why my router was only yielding roughly half speed, and since a direct ethernet from modem worked, i left it at that.
This morning upon turning on the PC, i had no internet on my PC. I checked, and the rest of the house is fine. Now, no matter what, I can't get internet to the PC on the direct line from the modem. If I run a line from the router to the PC, it works, but still at ~50% speed
I have tried:

• all network reset commands (netsh winsock reset, etc)
• rebooting PC
• rebooting modem (twice)
• windows updates, incl drivers
• running network troubleshooter
• running ONLY direct line from modem to PC (pulled line from modem going to router)
• switched ethernet wires
• using 2nd ethernet in port on PC

by the way, months back, in trying to solve the 50% speed problem, I went out and bought a new router with all the latest standards, and to my amazement, still got 50% speed. So yeah, I have no idea what's going on.

:)

 

Unable to connect to Cable Modem


I have an issue with my Windows 10 PC not connecting to my cable modem by ethernet cable. I connect the PC to the modem and all I get is "unidentified network - no internet", yet my laptop connects to the modem by ethernet (I'm using it now) just fine. I've tried everything I can think of to get my PC to connect to the modem, but nothing has fixed the problem so far. I can connect my phone to the modem fine by wifi as well, so the modem isn't the issue - or is it? Yesterday I had no issues with connecting to the modem and internet until I had a "blue screen event" and when the computer rebooted, I had the yellow triangle ! ever since.

Please HELP!!

 

Wireless cable modem/router/firewall

can someone recommend me a wireless router with built in cable modem. Most of the devices ive seen are equiped with ADSL modems!

required features

• Wireless

• firewall

• router

• Built in cable modem

• fully telewest/blueyonder compatible

 

Ethernet Connection

Hi,



Thank you for posting your query on Microsoft Community.



We would like to ask additional information that will help us in resolving the issue.

• What kind of computer are you using? Is it a desktop or a laptop?
• Did you make any recent changes to your computer?
• Have you tried troubleshooting the issue by yourself? If yes, what were the steps you have taken so far?

I would suggest you to try the following and check:

• Verify that the cable connects the modem to the wall jack is connected securely.
• Verify that the cable connects the computer to the modem is attached securely at both ends.
• Restart the router/modem.

Follow the steps and let us know if it helps.