I had problems with my File Explorer application
Firstly, from this webpage, I learnt that the the Event Viewer application would help to identify the cause of the crashes. To start up Event Viewer, do a right click on the START button and choose the Event Viewer function on the menu. When Event Viewer opens, go to the Windows Log and choose the Application tag. You will find lots of error logs reported. Check the latest error that coincided with the time that File Explorer crashed. Below the window, you can see the details related to that particular error. In the case of my desktop, I saw:
Faulting application name: explorer.exe, version: 10.0.14393.953, time stamp: 0x58ba5aa4
Faulting module name: CompPkgSup.DLL, version: 10.0.14393.953, time stamp: 0x58ba5c12
Exception code: 0xc0000005
Fault offset: 0x000000000000349d
Faulting process id: 0x760
Faulting application start time: 0x01d2aed8b47aea57
Faulting application path: C:\WINDOWS\explorer.exe
Faulting module path: C:\Windows\System32\CompPkgSup.DLL
Report Id: 7ea04522-fc33-4619-b3eb-e413c990ef51
Faulting package full name:
Faulting package-relative application ID:
Easier said than done. How to uninstal this update? After some more groping around the Internet for answers, this I learnt: in order to proceed, click on the START button and choose Settings from the menu. Then select the Update & Security option, go to Update History and then choose Uninstall Updates. You'll see a long list of updates for your computer. Scroll down until you see Security Update for Microsoft Windows (KB4013429). To uninstal this update, click on it and then on the Uninstall an Update link at the top of this window.
You will have to be patient while the computer goes through a long process of reverting to the previous version of Windows 10 during which time the computer may reboot once or twice or maybe more times. Anyway, be patient. At the end of the long process when Windows 10 finally boots up, test your File Explorer again. It worked for me and I hope it works for you too. But please don't blame me if it doesn't work, okay? Do it at your own risk!