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Thanks ;you. I've tried that twice and it hasn't worked. However, the Spectrum person who was fixing our cables said that we have an extremely weak signal, as do our neighbors. They are scheduled to do major work in the neighborhood. I'll try again when the work is done on Monday. If the signal is not the issue, and I  do get notices that the signal is weak, I'll get a new card since the going in and out can be symptom of failing hardware. 

@asbarry​ 

Weak signal is not what you are experiencing... I've got Spectrum and had the same issue of the MODEM not sending a good signal to the router. The end result was not that my PC was connected to the Router, but slower speed tests, and delays bringing in email or browsing.

So, without knowledge of your router, and what I assume to be a Wireless connection, but what 'speed' wifi do you have? Wi-Fi 5, 6, or 7?

Of course, is this a NEW occurrence or has it always been like this? If new, what else had changed around the time this started?

If it works on other devices, are they connected the same way you are? 

What driver did you update?

After almost two years of flawless connection to an eero v6 mesh network (wired ethernet connection, not wifi), my XPS 8960 started dropping the internet connection.  This happened both when wired and when I tried with WiFi alone.  The internet connection was robust and worked flawlessly with all my non-Dell products (Surface Pro 8; MacBook Air; Apple TVs; Google TVs; Google Nest doorbell; home security system; etc.).  I have Pro Service, so after two hours the Dell tech guy could not identify the issue and so ordered that a home service tech come to the house and replace the motherboard and wifi card. However, this did not solve the problem.  I wiped the computer again and sent it to Dell for service, and they could not recreate the problem and concluded it was not a hardware problem.  It seems pretty clear that there is a software problem related to the Killer Network Card that results in dropping the network connection.  The connection is reestablished when I re-boot but then quickly becomes unstable and disconnects.  I cannot believe I have a unique situation and would like to hear from others with this problem and if anyone has found a solution after the Dell support people have failed (as have the eero people).  

Same issue here....holds internet for a few seconds and goes away...have to disable and reenable in device manger to get a few more seconds!  Not good!
Any solutions?

@user_cebd58​ Yes, there is a solution, which I posted several days ago but the Dell overseers seem to have removed.  The problem all along was with the Killer and intel network and wifi drivers, which were sorely out of date and unable to maintain network connections.  In the last two weeks of October, Dell finally posted updated drivers

I wish that was the solution....

As a test, I installed a J5 Create USB to ethernet.... same issue.

Running ncpa.cpl from Windows Button - R shows me the network adapter as being disabled.   Device manger shows enabled.  Going from enabled to disabled and back to enabled in device manger works for about 5 seconds and then the network adapter goes back to disabled in ncpa.cpl

Any suggestions?

@user_cebd58​ Dell Pro Service first replaced the motherboard and network card in my 8960, which I then had to rebuild from scratch.  Same connectivity issue until the new drivers were issued.  Once installed my 8960 has been working as designed.

For my issue, it's different. It's more of a Windows 11 issue.  Something is disabling the network card.  Doesn't matter if it's the one on the motherboard or a USB network adapter. They both get disabled after a few seconds.

I was finally able to fix this problem on both my laptop and desktop. Although I can't find the exact website that gave me the solution, I think this is it:

Reset Network Settings using Command Prompt: Run Command Prompt as administrator and execute the following commands in order: netsh winsock reset, netsh int ip reset, ipconfig /release, ipconfig /renew, ipconfig /flushdns. Then, restart your computer.

This worked immediately for me. Hope it works for you.

Ann