Following the change of your account password on a WIFI connection or off site,  the device log in password WILL NOT update.
This will need to be done by using a wired connection onsite, or using the VPN connection.

To update the password using the University VPN:

Log into the device with your old password

Connect to VPN with your new password - please see the following guide

- https://itservicecentre.derby.ac.uk/hc/en-us/articles/360012257240-VPN-for-Managed-Staff-Windows-PCs

NOTE: If the AnyConnect software is already installed, go to to step 6.

Once connected, press Control, Alt, Delete or the Windows key and L on your keyboard

Select Lock Device 

Press the Enter key and type your New Password to unlock and log back into the device