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This is not a duplicate from How to Unblock Previously Unblocked CHM File

  • In my case, the chm file is not on a network drive,
  • it is on a local folder,
  • it has opened in the past without problems,
  • the registry keys are there, it tried with different values in the key MaxAllowedZone

I open this file once a week, and suddenly today it does not open It just displays an empty screen and has the waitcursor running forever. All I can do is end process thru task manager.

I need this file to be able to get my work done, so any help here would be so great

I also tried all options found here https://support.microsoft.com/en-us/help/892675/certain-web-sites-and-html-help-features-may-not-work-after-you-instal
But again it does not help

GuidoG
  • 225

1 Answers1

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I never have had this problem on my Windows 7 machine (I'm now on Windows 10).

First, please check if other CHM files can be opened.

Internet Explorer (not EDGE) settings have a direct effect on the display in CHM. Please clear the cache of Internet Explorer and / or reset all Internet options to the default settings (please be careful!) as a first step.

Another thought: The hh.dat file stores user-specific information on all the HTMLHelp files (*.CHM) on your system (position, favourite topics, search history, etc.), and may cause a error if it has somehow been corrupted.

Delete or rename the file hh.dat to reset all (!) CHM windows on your system to their default settings as a second step. Windows will create a new version of hh.dat when you next open any .chm file. You should find hh.dat at:

Windows 7: \Users\%username%\AppData\Roaming\Microsoft\HTML Help

help-info.de
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