The CHM file which is being opened is infected with an undesirable malware.Incomplete installation of an application that supports the CHM format.Accidental deletion of the description of the CHM from the Windows registry.Incorrect links to the CHM file in registry entries.Corruption of a CHM file which is being opened.There may be other problems that also block our ability to operate the Microsoft Compiled HTML Help Format file. The inability to open and operate the CHM file does not necessarily mean that you do not have an appropriate software installed on your computer. Possible problems with the CHM format files Now just download and install the appropriate application. The first part of the task has already been done – the software supporting the CHM file can be found in the table. The first and most important reason (the most common) is the lack of a suitable software that supports CHM among those that are installed on your device.Ī very simple way to solve this problem is to find and download the appropriate application. If you cannot open the CHM file on your computer - there may be several reasons.

Chm file type