In Microsoft's Technet forum a user proposes a workaround within this thread using symbolic links. Then the CHM file should be viewable again. This deletes the Internet zone bit of the file. Right-click on it, go to Properties and make sure that the Allow button is not displayed on the General tab or, if available, click on the button. The files are then considered as unsafe and are no longer viewable.Ī simple test helps to check, whether this is the cause: Just move the CHM file to a local folder. Microsoft therefore internally sets Internet zone bits for CHM files at network level. The background is that CHM files are HTML documents and pose a latent security risk. It becomes apparent that viewing the content of CHM files from a network share is no longer possible. After installing update KB4103727 it is no longer possible to open CHM files under Windows 10 V1709. Within this Microsoft Technet forum thread a user already outlined the problem.
The description of both update packages provides a direct reference to the change: Security updates for Internet Explorer, Windows apps, Windows kernel, Microsoft graphics component, Windows storage and file systems, HTML help, and Windows Hyper-V. Users of Windows 10 V1803 experience the same problem with update KB4103721, under Windows 7 the update KB4103712 is seen as the cause. This update fixes some security issues in Windows. Update KB4103727 has been released on for Windows 10 V1709 (see Windows 10 security updates May 8, 2018). It looks like both features have been disabled by updates. CHM help files and the second, calling help via F1 function key.
Unfortunately, customers have had problems with this since the Microsoft update KB4103727, help cannot be called.ĭo you know something about it – in the best case, of course, a solution? (where the solution to uninstall the update is out of the question). I work for the company xyz …., and we provide the help to our customers once as manual (PDF) and once as online help (*.chm files à F1 key à appropriate help topic). A German blog reader, however, send me a mail that drew my attention to the topic. I need to confess, I wasn't aware of this issue, because I am not using CHM help files frequently.
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