Start > Run, type in 'regedit' (without the quotes) in the search box.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon.
In Winlogon, on the right side, there should be a value called "Shell".
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon.
In Winlogon, on the right side, there should be a value called "Shell".
Double click this value.
Make sure only 'Explorer.exe' is the value of Shell, if anything else is there, simply delete it and leave 'Explorer.exe'.
