Article ID: 917556 - View products that this article applies to.
When you try to log on to a Windows XP-based computer from the Welcome logon screen, you cannot type your password. For example, when you click in the password box, and then you try to type the password, nothing happens. Asterisk characters do not appear in the password box, and the password is not acknowledged. Because of this problem, you cannot log on to the account by using password authentication. This problem may occur only occasionally.
This problem may occur if you have installed any of the updates that are described in the following Microsoft Knowledge Base articles:
(http://support.microsoft.com/kb/884883/ )Multiple versions of Comctl32.dll may cause both Windows XP style and Windows Classic style windows to appear in Windows XP
(http://support.microsoft.com/kb/908531/ )MS06-015: Vulnerability in Windows Explorer could lead to remote code execution
(http://support.microsoft.com/kb/893086/ )MS05-016: Vulnerability in Windows Shell that could allow remote code execution
(http://support.microsoft.com/kb/921398/ )MS06-045: Vulnerability in Windows Explorer could allow remote code execution
(http://support.microsoft.com/kb/900725/ )MS05-049: Vulnerabilities in the Windows shell could allow for remote code execution
(http://support.microsoft.com/kb/923191/ )MS06-057: Vulnerability in Windows Explorer could allow remote code execution
To work around this problem when it occurs, temporarily use the classic logon screen to log on. To do this, follow these steps:
(http://support.microsoft.com/kb/291559/ )How to change the logon window and the shutdown preferences in Windows XP
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.