Try this:
a) create a shortcut to Explorer.exe on your desktop
b) right click on the shortcut and choose 'Properties' and click on the 'Shortcut' tab
c) you will see the default '%SystemRoot%\explorer.exe' in the 'Target:' field
d) change the value to: C:\WINDOWS\explorer.exe /n, /e, c:\
e) click OK and exit