Manish Pansiniya's Blog

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Open CHM File From Network – CHM Opening Error

with 2 comments

When you open CHM file from network, you get Action Cancelled error. This is due to restricted policy on computer.

Please follow the following step to change the same.


SOLUTION: How to get around it? Simple, edit the registry.

  1. Start > Run (or {WINDOWSKEY+R}), type in ‘regedit
  2. Browse your merry way to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x
  3. Here you may or may not find a subkey named ‘ItssRestrictions’ if you dont create it by right clicking on 1.x and selecting New > Key.
  4. Then in the ‘ItssRestrictions’ subkey create a new DWORD value named ‘MaxAllowedZone’, here we enter a value from 0 to 4 depending on how you want to restrict the content.
  5. I put 3 for the allowing all content except restricted site.



Written by Manish

July 13, 2007 at 6:05 am

Posted in Uncategorized

2 Responses

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  1. thanks

    Sangsu Baek

    July 23, 2008 at 2:01 am

  2. Cheers mate,
    It took quite a while to find your solution through searching on Google!
    But you are right on the money!
    Well done!
    I didn’t realise that the .chm files that I was trying to open were all on my Network Drive!

    John Nicol

    November 17, 2008 at 10:12 am

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