IP Address conflict on


Sometimes when I restart one of my Windows 10 computers the network never gets online. I have to disable/enable the network to get it back. the reason seems to be an IP conflict with the address This computer has a fixed IP, no DHCP is involved. The NIC is an Intel I219-V.



Event ID 4199, TCPIP: The system detected an address conflict for IP address with the system having network hardware address 20-4C-9E-49-38-8A.

A quick check in the tracking system revealed this article from Cisco: http://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/8021x/116529-problemsolution-product-00.html. It talks about a conflict between the IP conflict detection system in Windows and an ARP Probe sent by the switch as part of IP Device Tracking. I am no Cisco expert, but I would like to have a chat with whoever thought that IP conflict detection should start BEFORE the nic has an IP set…

As far as I can tell the IP Tracking function on the switch is enabled by default from IOS version 15.2.


Turn off IP Device Tracking at the switch

https://supportforums.cisco.com/discussion/11960461/ip-device-tracking talks about running the following commands on the switch:

switch(config)# int range gig1/0/1 – 24
switch(config-if)# nmsp attach suppress

This is supposed to turn off the IP Device tracking on a  per switch basis. I do not have access to my switching infrastructure, so I have not tested this. I will update this post if I get the opportunity to test it.

Turn off the Gratuitous ARP Function

Refer to this ancient KB: https://support.microsoft.com/en-us/kb/219374. It is written for NT4, but it still works. Be aware, this basically turns off IP Conflict detection completely.

Upgrade your NIC driver

And hope that it helps…

Getting rid of that pesky Store Icon


Fore some reason, the Store Icon comes back to haunt you every time you restart. That is, it stays pinned to the task bar no matter what, and if you un-pin it, like a zombie it will rise from the grave as soon as you reboot…


This is probably a scheme to make us buy more of those stupid “modern” apps. Not that there aren’t useful apps, but they are few and far between. Anyways, the point is to get rid of the icon. I could of course disable the store altogether, but I just want it out of my way and off my lawn –eh, taskbar.


The good people of Microsoft has finally given us a proper option to get rid of it.  Salvation comes in the form of a GPO called “Do not allow pinning Store app to the Taskbar”. The wording is such as to make us believe that it is all our fault to begin with, but no matter, lets just remove it.

The GPO is hidden in User Configuration under Policies, Administrative Templates,Start Menu and Taskbar:


Set it as enabled and deploy it to your users as best fits you. If you are looking to make this change on you own local computer without a domain, just start gpedit.msc to edit your local policy.