In the Task Manager window, click File, then New Task (Run) or press the Alt key then down arrow to New Task (Run) on the drop down menu, then press the Enter key.Open Task Manager (Press Ctrl + Shift+ Esc keys together) this will open a Task Manager window.
This Powershell command will reset the Start Menu Button/Search Function and restore their function: Manually powering off the system and restarting the system may resolve the issue, but important information and data mat be lost. You may encounter a situation where the Start Menu or Search bar is frozen on the screen or locked from use on your Windows 10 system. This article provides the information on 'Windows 10 Start Menu or Search bar is frozen on the screen or locked from use '.