Internet Connection Sharing started causing intermittent disconnections recently

Question

I have had an up to date Windows 11 custom PC with 2 active network cards (1Gb and 10Gb) for a few months. I started noticing a few weeks some strange but rare disconnections, like some Remote Desktop connections (on alocal network) that dropped overnight. I didn't make much of it until a few days ago when they were more and more frequent to the point that today I can't have any Remote Desktop connection to any machine stable for more than a few minutes. When this occurs my browsers now hang (and Firefox even has to be killed and restarted). Windows does not notice any problem with the network, and the strange thing is that I can still ping any machine out there (local or web)...
After a lot of try and error I made sure that the problem was localized to this computer. I even pinpointed it to the activation of the Internet Connection Sharing on the 10Gb card: the trouble occur as soon as it is active. Nothing happens when it is inactive.

I have used the same kind of setup for many years now without trouble, starting with Windows 10: I connect my Hyper-V VMs to an internal network adapter so that they have an internal IP address (and DHCP), and I share Internet access with ICS (via the 10Gb network card). And now this makes my computer unusable...

Any ideas?

Answer 1

Hello Mathieu,

Good day! I'm John Dev a Windows user like you and I'll be happy to assist you today. I know this has been difficult for you, Rest assured, I'm going to do my best to help you.

**Check for updates

Select Start > Settings > Windows Update. Select Check for updates. Install any available and pending updates and restart your device. Please try to install KB5014668 then check if this fixes the issue.

https://support.microsoft.com/en-us/topic/june-...

Kindly let me know if this helps or if you have any further concerns.

Kind regards,

John DeV

Independent Advisor

Answer 2

KB5014668 did the trick: thanks!

Though I wish Microsoft were able to communicate more effectively when they screw up an update like this...