Computer boot only show desktop background without desktop icon what to do

1, no noodles we can use the keyboard, we press the keyboard key combination "Ctrl+alt+delete" in the Open menu we click "Task Manager," as follows;

Then we found the Explorer.exe process in the Task Manager's entry. Look at the boot. If there is a first end to it, if not the first to ignore.
Now we also click on the "File---> New task---> enter" Explorer "in the Tasks dialog box in Task Manager.

2, if the desktop is out, do not end it can not look down, otherwise we may be the desktop management program destroyed, so we download a new replacement.
We download or copy a copy of the same system's Explorer file to the USB drive:

And then insert it into our problematic computer, and then in the Create New Task window, click the Browse button, browse to the Windows folder, paste or replace the Explorer file here, and then select Explorer, click the Open button;

If it's still not working, we can ctrl+alt+delete into Task Manager again.

Also opens the file---> New task---> enter "regedit" in the Task dialog box, "Enter the system's registry

  Then we navigate to the left of the registry: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

To see if the shell value under this branch is "explorer.exe", if it is not modified to "Explorer.exe", if the shell value is not found, create a new string value, name "Shell", and set the value to "" Explorer.exe

And then continue to press the Ctrl+alt+delete three key combinations at the same time, and then select Task Manager to open Task Manager.

Select Select File---> New task---> enter "%windir%\system.ini" in the Task dialog box to determine.
on the first line of the; for 16-bit app support, press ENTER to add the following two lines (if you already have the boot and shell, and the parameter is not "explorer.exe" or something else after "Explorer.exe"), change it to "Explorer.exe")
[boot]
Shell=Explorer.exe

Modify save file: On the File menu, click Save, click the Close button, The pop-up dialog box asks if you want to save the modified file, and click the Save button.
When you are done, press the Ctrl+alt+delete three key combinations to select the reboot machine computer test.