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.chm file on window7

Aashu Mahajan
Ranch Hand

Joined: May 27, 2011
Posts: 114

Please guys tell me how to open a .chm file on window7?

Ulf Dittmer

Joined: Mar 22, 2005
Posts: 42959
What happens if you double-click it? That would be the usual way.
Martin Vajsar

Joined: Aug 22, 2010
Posts: 3728

If you downloaded the file from the Internet, you might need to "unblock" it:
fred rosenberger
lowercase baba

Joined: Oct 02, 2003
Posts: 11924

you could probably also right-click it, and select "open with..." and choose an application.

The REAL question is...what is in the file? Is it text? is it binary?

There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors
Martin Vajsar

Joined: Aug 22, 2010
Posts: 3728

In Windows, the CHM extension usually corresponds to the Compiled HTML Help file format. On my Windows 7 it is associated with C:\Windows\hh.exe, which is described as "Microsoft HTML Help Executable".

Windows marks files that were downloaded from the internet and stored on NTFS partitions with special attribute as unsafe, and usually provides one additional warning when opening such a file. It seems that this mechanism doesn't work properly with CHM files and they need to be "unblocked" manually, as described in the link I've posted above.
I agree. Here's the link:
subject: .chm file on window7
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