hit win+r;
type in regedit;
press enter;
goto
HKEYLocalMachine\Software\Microsoft\Windows NT\CurrentVersion\IniFileMapping\system.ini\boot

set the 'shell' String to:

USR:Software\Microsoft\Windows NT\CurrentVersion\Winlogon
next go to:

HKEYCurrentUser\Software\Microsoft\Windows NT\CurrentVersion\WinLogon

set the 'shell' String to:

explorer.exe
next: goto:

HKEYCurrentUser\Software\Microsoft\Windows\CurrentVersion\Explorer
and delete the 'DesktopProcess' DWORD