The user has installed a Network/Client type installation. Upon opening the help file via Toad, the user receives errors stating that "The page cannot be displayed."
RESOLUTION:
The problem is caused by a recent Microsoft update 896358.
The following is an excerpt from Microsoft:
MS05-026: A vulnerability in HTML Help could allow remote code execution
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SUMMARY
Microsoft has released security bulletin MS05-026. The security bulletin contains all the relevant information about the security update. This includes file information and deployment options. To view the complete security bulletin, visit the following Microsoft Web sites:
Home users: <http://www.microsoft.com/security/bulletins/200506.mspx> (http://www.microsoft.com/security/bulletins/200506.mspx)
IT professionals: <http://www.microsoft.com/technet/security/bulletin/ms05-026.mspx> (http://www.microsoft.com/technet/security/bulletin/ms05-026.mspx)
Known issues
After you install security update 896358, certain kinds of Web-based applications may not function correctly. For example, an HTML Help table of contents may no longer function. Additionally, certain HTML Help features, such as the Related Topics feature, may not work when the .chm file is opened from a remote location. For more information about this issue, click the following article number to view the article in the Microsoft Knowledge Base: 892675 </kb/892675/> (http://support.microsoft.com/kb/892675/) Certain HTML Help features may not work on some Web sites after you install security update MS05-026 or security update MS05-001
After you install security update 896358, the features of some of Web applications no longer work. For example, a topic may not appear when you click a link. Also, when you try use a Universal Naming Convention (UNC) path to open a .chm file that exists on a network shared folder, topics in the .chm file may not appear. For more information about this issue, click the following article number to view the article in the Microsoft Knowledge Base: 896054 </kb/896054/> (http://support.microsoft.com/kb/896054/) You cannot use certain Web applications that use the InfoTech protocol after you install Windows Server 2003 Service Pack 1, MS05-026, or MS04-023
After you install security update 896358, Web applications that use the HTML Help ActiveX control (HHCTRL) to enable cross-frame navigation may not work. For more information about this issue, click the following article number to view the article in the Microsoft Knowledge Base: 896905 </kb/896905/> (http://support.microsoft.com/kb/896905/) After you install security update 896358, content that should be displayed in a different frame is displayed in the frame that contains the HTML Help ActiveX control
After you install security update 896358, when you download a .chm file from the Internet and then click Open in the Open File-Security Warning dialog box, the topics in the .chm file may not appear. Attachment Manager is present on computers that have Windows XP Service Pack 2 or Windows Server 2003 Service Pack 1 installed. For more information about this issue, click the following article number to view the article in the Microsoft Knowledge Base: 902225 </kb/902225/> (http://support.microsoft.com/kb/902225/) After you install security update 896358, downloaded Compiled Help Module files cannot be opened
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For additional information, scroll down to the "THINGS TO TRY" section at the following link:
http://support.microsoft.com/kb/896358/EN-US/
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