
Press Ctrl+Alt+Delete
Now windows task manager appears , select processes from that
Click on explorer and End Process
If shutdown menu appear , cancel it
After sometime it will show an error message . Click on End Task.
If error message is not appearing
On task manager select Applications, then New Task
Browse the new location of new task from C:\WINDOWS\explorer.exe and click ok
Now Windows will reload explorer and if there any new registry settings.