The kindle eReader may get frozen due to many reasons just like any other device.
However, by completing a simple rebooting procedure on kindle is something beneficial which can be done by anyone.
Once rebooting has complete then you will find kindle paperwhite frozen on lock screen error is fix.
For avoiding freezing error you need to ensure kindle is not running low on battery and latest software is install on device.
How To Fix Kindle Screen Frozen Error?
There are few methods which assist to remove kindle screen frozen error completely and allow your device to work in best manner.
• Press and keep power button on hold for at least forty seconds.
• Once screen goes blank, continue to hold for another forty seconds and release it.
• Tap power key for restarting if device does not start on its own.

If kindle frozen on screen continues to follow then try connecting device with help of USB cable or power adapter which provided with device. Now begin charging device with official power adapter. Allow the eReader to charge for at least thirty minutes, removing the plug and then trying to restart device.
If kindle frozen on screen is showcasing error while downloading books.
You need to follow the steps mention below for its fixation.
1. Keep power key on hold for twenty seconds.
2. The display will go blank in few seconds.
3. Try holding power key down.
4. After twenty to thirty seconds release the key.
Once you complete the above mention steps you will get to see that kindle frozen issue is settle.