CategoryHowTo

Solve problems with .chm files

Many people download the mga.chm and other .chm files and store them somewhere on a network drive. However, when they try to open the mga.chm file, they can see the list of messages in the left hand pane, but "File not found" in the right hand pane.

People who are accessing the Magic Help file (Mghelpw.chm) from the Network get "Action canceled" in the right hand pane.

Background

After you install Windows Security Update Number 896358, certain HTML Help features may not work as expected. The problem occurs if the .chm file you are accessing is residing at a remote location on your network.

Solution

Make a registry change for the key:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\ItssRestrictions]

Change for the Dword value "MaxAllowedZone" the value data from "0" to "1".

The default value of MaxAllowedZone is zero. This value decides how access to different zones is allowed as explained in the table below. Enable only those security zones that you trust. Do not enable security zones about which you are not sure.

For more details on this issue you may also check the links below provided by Microsoft:

http://support.microsoft.com/kb/896054/∞
http://support.microsoft.com/kb/896358/∞

See also:

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