Windows XP Desktop Blank how to Recover Blank Desktop to Normal Desktop

Step 1. Press Ctrl+Alt+Delete & open  task manager
Step 2. Click on file & choose new task (run..)
Step 3. Type regedit and then display  registry editor page
Step 4. Carefully go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft \Windows     NT\CurrentVersion\Winlogon
Step 5. Search Shell value and double-click to open
Step 6. Type Explorer.exe
Step7. Restart your Computer and then Recover your Desktop