windows Start button stops working when clicked

[Windows Central Question]

The windows start button will not open with a left click of the mouse but will pop up as a list when right clicked with the mouse. This happens randomly and is only cured using the DISM /Online /Cleanup-Image /RestoreHealth process. What is causing the problem and why haven't MS fixed it. I got one answer which pointed to a DLL repair. When I clicked on it my Malaware blocked the sight. Does anyone have a good answer?