try reinstalling the windows and check if pad is working okay. If still problem appears after updating the PC in settings>update & security, Then, Go to lenovo official website. download lenovo service bridge and lenovo system update. Let the Lenovo system update app handle the rest. keep your device connected to charge and ensure not to interrupt because your bios will be flashed and updated. Don't select / mark the option ''Download deferred only'' in Lenovo update window. after every update, restart will be required several times. every time, manually open the app and check for next update. 3 or 4 software and firmware updates and boom - you problem solved after final restart demanded by pc itself after some time.