Run System Restore
OR
"HKEY_CURRENT_USER \ SOFTWARE \ Classes \ Local Settings \ Software \ Microsoft \ Windows \ Shell" . You can copy it and paste it into Registry Editor's upper bar if you wish. Now, right-click the "Shell" entry and select "Export" from the drop-down menu. Select where you wish to save this entry in case of problems.
now expand the "Shell" entry, find "BagMRU" and "Bags" folders, right-click each and select "Delete" from the contextual menu. Close Registry Editor, restart the computer and see if you can now open File Explorer.