BLANK DESKTOP

sometimes when u installed or downloaded a new program or hardware and then when you restarted the sys, it will just have a blank desktop with no icons or anything. (Windows Explorer (Explorer.exe) does not run, and the Windows icons and the Start button are unavailable)

To resolve this problem, follow these steps:
a. Press CTRL+ALT+DEL to start Task Manager.
b. Click File, and then click New Task (Run...).
c. In the Open box, type regedit, and then click OK.
d. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE
System
CurrentControlSet
Services
RpcSs
e. On the right side of the viewing pane, right-click ObjectName, click Modify, type LocalSystem in the Value data box, and then click OK.
f. Restart your computer

or if not you can go to safe mode and uninstalled the program that you just added in safe mode or do a system restore