After upgrading the software of a PC, including Internet Explorer, presents the following issue: "You canceled the navigation to the webpage"
first I can think is that this is a file problem, but basically it is a security issue from Microsoft that normally occurs when these help files are on a server in our organization and not in a unit our local team.
What recommends Microsoft is primarily helps copy files to any local drive of our team, but as the space can be limited, here the step by step solution.
Diagnosis:
We have just updated our system is just connecting a new PC to the network or maybe just had the innocent intent to update the web browser that we were using and check if While we have access to help files are on a shared drive, you can not display help as this message appears:
first thing I did was check the version of the help that was installed on the system while checking if there is to update, but Microsoft says that if this is possible, I am not aware, nor was it necessary, it is possible that all have the same version that is the one that comes with Windows (in my case SP3): 
The trick: What I checked in a couple of sites was that this is a Windows Update caused all these evils, this update enables a "protection" so that keeps the pages, in this case *. chm files that are not in a safe area, can be could be verified as "malware."
The first thing we do is to check which server or network drive where the files we need to see, in my case file was in her unit red "Y" which in turn was in the shared folder on the server HTMLHELP PENS09, since registration requires that the shared drives carry double diagonal, as if programmed in C, since they facilitated the example input record to be created, in reality it is only necessary to copy and paste into a text file saved with REG and then combine such information in Windows registry:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE \\ SOFTWARE \\ Microsoft \\ HTMLHelp \\ 1 . x \\ ItssRestrictions]"UrlAllowList" = "\\ \\ \\ \\ PENS09 \\ \\ HTMLHELP; file: / / Y: \\ \\ SCMHELP \\ \\ SCM500 \\ \\ EN""MaxAllowedZone" = dword: 00000002
To get an idea of \u200b\u200bhow is this in the log I attached the following image (or if you prefer Regedit.exe direct income:
After updating the record we just have to close the Help window was open and reopen CHM help files or shortcuts that we have and the result should be expected : 
Explanation and sources:
What you do with this small change to the registry key is to create two additional ItssRestrictions and values \u200b\u200bfor the same:
UrlAllowList: the addresses to which we wish to give permission for display of *. chm
MaxAllowedZone: the level of permission you are going to grant the above list, in this case "2" is equivalent to give intranet access to the machine and secure sites zone.
Whoever or required to expand their knowledge regarding this change should review the following notes:
MS05-026: A vulnerability in HTML Help Could allow remote code execution ( http: / / support.microsoft.com/kb/896358 )
as previously 
