| Error Message: This Program Has Performed an Illegal OperationLast reviewed: November 26, 1997Article ID: Q174714 | 
| The information in this article applies to: 
 
 SYMPTOMSWhen you try to log off from Outlook Express without choosing a user name, you may receive the following error message: 
 This program has performed an illegal operation.If you then click Details, you see the following message: 
 Rundll32 caused an Invalid Page Fault in module Mslocusr.dllNote that when you close the error message box, you remain logged on. 
 RESOLUTIONTo resolve this issue, repeat the log-off process and click a user name when you are prompted. 
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| Additional query words: 4.00 
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