Windows 10 loss of TCP connectivity

EventID 4227 seems related to too many outstanding TCP connections.

Not an answer, but the following first steps are too long for a comment:

1. Run sfc /scannow
2. In Device Manager delete the network adapter and reboot
3. Use TCPView to see outgoing connections when this happens
4. Increase maximum of outgoing connections by setting TcpNumConnections and see also the other parameters described in this article
5. Disable IPv6
6. Restart Chrome
7. Start Windows in Safe mode with network and if this stops happening then some installed application is to blame
8. Use Chrome in incognito mode to temporarily disable extensions
9. Try Firefox
10. Do you have many tabs open? Or when this is happening do you always have one particular website open?

The results of the above may help with localizing the problem.

Try to stop and disable "IP Helper" service and disable(uncheck) in property of adapter IPv6 protocol.

Just in case: do you have any kind of firewall or antivirus which could block https communication? I once had a similar problem with my antivirus, which was blocking all of my https communications, filtering them like it was a man-in-the-middle attack..

I could not understand why, but trying disabling the antivirus for a minute, I noticed I could browse again..

PS: if you have problems only with some https sites, try checking if they are using old or invalid SSL certificated...

[edit] Ok, no antivirus, so let's try other options..

• You say that a simple reboot (without powering off the system) doesn't solve the problem.. but what if you completely power off the system and then switch it on after some seconds? I had headaches with stuff not properly resetting onless completely powered off... you might want to check it.

• If you have other computers on the same local network, try checking if you can connect to them (when you experience the problem you're dealing with)

• you don't say how you connect to internet: I'm supposing a shared connection through a router... are you able to surf the web from other devices on the same conection, when you hit the problem on that pc?

• If you have other connections (wifi, usb-to-ethernet adapter, etc..), you could try using one of those for a while and see if it still happens (In my win10 system I had to give up using my integrated network card because its driver was often triggering blue-screens and there wasn't a win10 version)

• I'm not strong on IPv6, but I had issues in the past with it.. in case you don't use it, you can also try disabling the IPv6 stack and only use IPv4

• When you experience network lock-ups, you can also check open connections with the netstat command and see if you notice something strange..

Hope this helps