1.Right click on start, Task Manager
2.Click on more details
3.Go to Details tab
4.Find explorer.exe, Right click, Click, End Process ; (Do not close Task Manager)
5.Go to file, Run new task, type explorer.exe and check create this task with administrative privileges. OK
6.Go to start, Setting, Apps, Default Apps, Web Browser, Click on Microsoft IE, select your browser.
7.Restart