Wired desktop has to restart in order to connect to internet

I have a custom-built desktop PC running Windows 11 Pro, 23H2 build 22631.2792. Motherboard is Asus Z390-E gaming. PC is wired via cat6 cable to router. Sometime within the last week or so, when I boot up in the morning, I don't have internet access. If I restart the computer, it then connects to the internet and stays connected until I turn it off late at night. I have searched the internet for this problem and it appears others are having the same issue with Windows 11. I've reset the network settings, installed the original LAN driver from Asus' website and unchecked "allow windows to turn off this device to save power" in power management. I don't think it's the cable as there would be intermittent outages. At this point, I'm suspecting that the most recent Windows 11 update broke something as in not compatible with network drivers. I realize there are some things I still need to try, but was just wondering if anyone else had this problem after a recent Windows 11 update. My next step will probably be to try and do a system restore prior to the last update or uninstall the last update if I can.

Have you checked your UEFI settings for anything related to Ethernet ports?

Windows 11 does have, for some manufacturers, the ability to update the UEFI firmware too. Check the WU history --> Driver Updates (and Other Updates) to see if there is mention of a UEFI update for your system.

Also in Driver Updates, see if the driver for your NIC was updated any time recently.

This only happens when the computer is turned off for the night or if you turn it off now for five minutes and turn it back on ?

abactuon said:

This only happens when the computer is turned off for the night or if you turn it off now for five minutes and turn it back on ?

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This morning it did happen after a shutdown, but since then I've changed the network drivers. I just shut it down for 10 minutes and it came up with internet access. I'll see what happens in the morning and report back.

Johnlgalt: No UEFI updates that I am aware of. I had been using the Intel Update Tool and it seemed like it was always installing a newer driver. If the problem persists tomorrow, I'm going to restore prior to the Nov. 30th update which is about when the problem began.

It's working fine for me (22631.2715).
Connection to the provider via PPPoE.
But I turn off the router when I'm not using it for a long time.
The router is a separate computer with Linux OS and does not depend on Windows. You probably know it without me.
Try to access the web interface of the router, for example 192.168.1.1 (or whatever it is).
There you can enable logging.
I'm curious, I'll try keeping the router on overnight tonight.

I just installed 2792 via in-place upgrade to fix a problem I was having in 2715.

I have done short reboots already, and had no issues. I, too, will keep an eye on mine and see if it acts up after a longer shutdown period.

Well, good news this morning (knock on wood). It came up with internet access. I'm thinking maybe a recent update is somehow causing issues with certain drivers. If it happens again, I'll dive into it further and report.

I thought I would update this thread as the OP and finally solved the problem. My wired speeds would start out fast (1 GBs) and drop to only 100 MBs after a while. I switched to the built in wifi on the MB and it did the same thing, started out at 600+MBs and dropped to 90MBs after a while. A restart restored the speed for a little while. Other devices such as cell phones, laptops had no issue so I was thinking it could not be the router. I was going to reinstall windows 11 when I spotted a forum post where a person said to check if I had Zoom or any such programs installed. I don't use Zoom, but I noticed, in checking all apps on my PC that an update must have installed Microsoft Teams. I've never used it and when I tried to open it, there was an error message stating: "Ooops-we have a problem". The program must have never installed correctly. Anyway, once I uninstalled Microsoft Teams, my speeds (both wired and wireless are where they should be and have not dropped since. Had I run resource monitor from the beginning I might have spotted it earlier. Anyway, hope this might help someone else.