Can’t save IP settings – how to fix it?

When you manually change network settings in Windows 10 or Windows 11 through the Settings app interface, you may encounter the message “Can’t save IP settings. Please check one or more parameters and try again. ”

This manual explains in detail what may be causing the problem and how to fix the error saving IP settings for the situation in question.

Specifying the length of the subnet prefix instead of the subnet mask, errors in specifying IP

Most often, in the latest versions of the system, the problem is caused by the fact that in the “Subnet prefix length” field, the user does not specify the length (from 1 to 64 for IPv4 and from 1 to 128 for IPv6), but the subnet mask, for example, 255.255.255.0 – such an option does not work any more.

For the “standard” subnet mask 255.255.255.0, the prefix length will be 24 and it should be specified in the corresponding field in the parameters – in this case, the error “Cannot save IP parameters” will not appear.

And, just in case, one more possible reason: errors, typos in the indication of IP addresses – all this can also lead to the same error: for example, you indicated in the address fewer (or more) digits than is possible for the IP address, leaving beyond the range of 0-255 values, a comma was used instead of a period.

Change IP parameters via control panel

It cannot be ruled out that the interface for changing IP settings through the “Parameters” for some reason fails, in this case you can use the standard interface of the control panel in order to set the IP parameters manually:

1. Press Win + Rkeys on your keyboard, type cpl and press Enter.
2. In the window that opens, select the network for which you want to change the parameters, right-click on it and select “Properties”.
3. In the list of network components, select the protocol for which you want to change the settings, for example, IP version 4 (TCP / IPv4) and click the Properties button.
4. Set the required IP parameters and save them.

When using the control panel interface, there are usually no problems with changing parameters (provided that you have administrator rights in the system).

If this method does not work either, try resetting the IP before changing it using two commands in the command line running as administrator:

ipconfig / releaseipconfig / renew