·Do you receive any error code with the error message?
·What is the make and model number of the computer?
This issue occurs if the Userinit key in the Windows registry has been modified or if there is incorrect shell registry settings.
Try the steps listed below and check if it helps:
Important: The instructions below contain steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully.
For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information view the article in the Microsoft Knowledge Base: How to back up and restore the registry in Windows:
a.Press CTRL+ALT+DEL, and then click Task Manager.
b.On the File menu, click New Task (Run...).
c.Type regedit, and then click OK.
d.In the left pane, locate and then click the following registry subkey: