Thread: Assigning static IP address

I'm not sure why this seems to be happening to you but you should be able to add, remove and or edit any IP address assigned to your NIC by using the advanced button -> IP Settings tab, in the properties of IPv4 within the properties of your Network Interface Card.
WinLogo Key + R and type
ncpa.cpl
hit enter
Select then right click your NIC (usually "Local Area Connection") and choose properties.
In the box / frame labeled "This connection uses the following items:" scroll as needed and select "Internet Protocol Version 4 (TCP/IPv4)" and click the properties button.
On the resultant dialog box click the "Advanced" button and under the IP Settings tab you should find any and all stored IP addresses for that particular NIC.
Any NIC can have and actually use multiple IP addresses as well as Gateways if you're very clever at writing complex route tables. Otherwise it's best to stick with a single address per interface. We used to play with this a lot when studying for RRaS.
Anyway you should be able to clean things up without removing the device and rebooting. If not there may be a more complicated underlying issue which might need a bigger hammer.
You may want to look into rebuilding the IP stack

netsh int ip reset resetlog.txt

and or the Winsock Catalog

netsh Winsock reset

Regards
Randy

Are you per chance using any third party software to configure or otherwise manage these particular network connections that might be causing the interface ip addressing to persist?
I cannot manage to create nor duplicate your problem, but......
If I am understanding you correctly, you are saying that a single interface has multiple and persistent IP addresses that you have configured over time and they will not go away unless you remove the card and reboot.

removal and reboot is the only way to remove the IP.

So..... all information regarding the IP addressing of all interfaces is contained in the registry here.....HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip\Parameters\Interfaces
If you are reasonably comfortable taking a peek under the hood, you'll notice (depending on the number of interfaces) a couple sub-keys under that location. Select each in turn until you see the one you are looking for. It should be reasonably evident as the data value for "IPAdress" will contain multiple IP addresses if my understanding of what you have explained is accurate.

You can edit this information simply by double clicking the "IPAdress" data value and editing as you wish. You should be able to remove any extraneous IP addresses as well as alter the one you are working with to reflect the value you wish. Not exactly an ideal solution I know, but it should save you a removal and a reboot.
NOTE: This has real time impact on your interface and does not require a reboot to take effect.
And my boiler plate registry editor warning:

Using the Windows Registry Editor can cause serious, system-wide problems that may require you to re-install Windows to correct them. It cannot be guaranteed that any problems resulting from the use of the Windows Registry Editor can be solved. If you choose to edit the Windows Registry please understand that you do so at your own risk so unless you feel fairly comfortable and confident you should probably not use the Editor. Changes made to the Windows Registry can take effect immediately and those that do not will take effect following the next reboot of your computer, and a current backup is not automatically made for you....So manually create a system restore point, backup the registry and export the key you are editing for safe keeping before doing so.