File Explorer is not the same tool as Internet Explorer. To open Internet Explorer, in the search box on the taskbar, type Internet Explorer, and then select Internet Explorer (Desktop app) from the results.
To open File Explorer in Windows 10, select its icon on the taskbar, press the Windows logo key + E on your keyboard, or select Start > Documents (directly beneath your user icon).
Here are some things to try if File Explorer won't open.
If File Explorer doesn’t work more reliably after trying these steps, please send feedback through Feedback Hub so Microsoft can investigate potential issues.