After updating your Xperia smartphone to official Lollipop firmware by Sony, are you facing this weird “Lockscreen disabled by Administrator error”? If yes, there here’s a fix for this problem.
Its not only you who is facing this issue on Xperia Z2 or Z3 after updating the firmware, but there are thousands of other users get the popup with this error. However the fix to this problem is very simple and involves only few steps.
How to Fix Xperia Lockscreen Disabled by Administrator Error
Step 1: Unlock your phone and go to Settings –> Security –> Screen Security.
Step 2: There check if you are also seeing error there? If yes, then go to Security –> Credential Storage and there tap on “Clear Credentials”.
Step 3: Tap “OK” to confirm this action.
Step 4: Now set the password or any other option as lockscreen security and you are all set to go.
I hope this will fix the lockscreen disabled by administrator issue/error on your Xperia device after updating it to Lollipop. If the problem still persists, let us know.