Some .chm files do not work on Windows 7 - Process Monitor - Navigation to the webpage was canceled
This took me a couple of minutes to find so I thought I would share this here.
I downloaded ProcMon (process monitor) and could view the help file. It would open but the right pane had a message: "Navigation to the webpage was canceled" The left pane was functional however.
I found the help file. This is a .CHM file stored in the directory where Procmon was installed.
To be able to use is, Right Click on the procmon.chm file and choose 'Properties' from the menu. Then in the general tab, click on Unblock! (You may need to run as an Administrator account to see the unblock item).
Works fine now!
Let me know if you found this useful by dropping me a note please!
Comments
Anonymous
June 14, 2009
Thanks! I unblocked all of the *.chm help files in the Sysinternals Suite folder. Now ALL of the help files in the Sysinternals Suite work fine!!! FYI -When I searched for "help file Navigation to the webpage was canceled" - I clicked on the first result... it took me to "http://blogs.msdn.com/jpsanders/archive/2009/06/10/some-chm-files-do-not-work-on-windows-7-process-monitor-navigation-to-the-webpage-was-canceled.aspx". I found your solution, but there was NO WAY TO LEAVE A COMMENT. I clicked around and found that the bold words at the top "Http Client Protocol Issues" took me to all of your blogs with that title. I could "comment" only from that page. I am telling you this because I do not think the search should have landed a page without the option to comment - when you in particular are asking for one. I did notice that this is the only topic on the "Http Client Protocol Issues" page that does not have a "filed under" property. Maybe that's why???Anonymous
June 14, 2009
You need to be logged in to leave a comment. I will enable anonymous comments. Thanks for the feedback!Anonymous
June 26, 2009
I am using Windows Vista Home Premium. When I try to unblock the file, it seems to let me (the unblock button goes away when I click apply). However, it puts the block right back on (that is, when I go back to the file and examine the properties, the block is back).Anonymous
June 26, 2009
The key to this will be to find out who is changing the file attributes back (AntiVirus maybe). If you run Process Monitor, Available from http://www.microsoft.com/sysinternals, You should be able to deternime who is changing the file attributes back and if you are sucessfully unblocking the files to begin with. You can search on the file name to see all activity on that particular .chm fine. Let me know what you can see from the process monitor logs.Anonymous
December 25, 2009
This helped me. I knew it was blocked from pre windows 7 time frame but had forgot how to unblock. Thanx.Anonymous
January 04, 2010
When I click on properties I only get a General tab which does not have an Unblock button. Any ideas?Anonymous
February 14, 2010
Thanks worked like charm on my moq.chm file! I would just add that you have to right click the .chm file a click "Properties". And then go to the General tab and do the UnBlock. I know this sounds silly to most users, but less experienced ones might be wondering where in the menu is General tab.. :) JjAnonymous
February 17, 2010
I could not find the unblock selection, but resolved the same issue by moving the chm file to the public documents folder.Anonymous
March 05, 2010
AWESOME! You saved me hours of frustration! Thanks for posting. by the way Thomas click on properties after you do the right click and you will see the unblock button on the bottomAnonymous
March 06, 2010
Thanks. It's simple and easy, and does work for me.Anonymous
March 10, 2010
I could not find the unblock at first. I am running Windows 7 Professional. To get the unblock to appear I had to run Windows Explorer as Administrator, then when I right-clicked on the chm file the unblock button was available. This is the first site I found that mentioned the unblock feature. thank you.Anonymous
April 14, 2010
The comment has been removedAnonymous
April 14, 2010
Oh, and http://blog.crowe.co.nz/archive/2007/04/13/719.aspx says here's a possible CHM unblock: [HKEY_LOCAL_MACHINESOFTWAREMicrosoftHTMLHelp1.xHHRestrictions] "MaxAllowedZone"=dword:00000001 [HKEY_LOCAL_MACHINESOFTWAREMicrosoftHTMLHelp1.xItssRestrictions] "MaxAllowedZone"=dword:00000001 Maybe it works, maybe it formats your C: drive; dunno. [Joke: the reg patch doesn't format your C: drive. But if you've negated the block and run an infected CHM file, IT just might do so.] You picks your poison and you takes your chances.Anonymous
April 18, 2010
Thanks! helped me get a CHM working.Anonymous
April 20, 2010
Update: The reason for these blocked files is that they are downloaded and installed from the Internet Zone (Security Measure). There are numerous references to Registry and other fixes but don't use them. You can copy them off to a FAT drive and then copying them back to a new directory (removing the stream that has this information) or use the sysinternals Streams.exe tool. http://technet.microsoft.com/en-us/sysinternals/bb897440.aspx Then you can remove the security info by removing the streams from the chm files by going to a cmd prompt, navigating to the dir with the chm files, ensureing they are NOT marked read only and typing <<Path so streams>>streams.exe /d *.chmAnonymous
December 01, 2010
The comment has been removedAnonymous
February 16, 2011
ah thanks, just ran into this issueAnonymous
March 18, 2011
Thanks for the answer. Your post was the first I looked at and it was spot on. I was using XP Pro and didn't even know that xp had a block function.Anonymous
May 03, 2011
The comment has been removedAnonymous
October 17, 2011
I_C
Thanks, the reason for mine was the # in directory and names. As I had books on C# !! Could not see unblock even as Administrator but renaming files to Sharp from # worked a charm
Anonymous
October 17, 2011
Thanks Simon for publishing your solution so that it may help others!Anonymous
December 19, 2012
Thanks for sharing this. It worked for me.Anonymous
December 20, 2012
Thanks jpsanders for your great solution. It is much better than the one described in the article.Anonymous
January 12, 2013
Thanks, works on windows 8 as well..Anonymous
February 04, 2013
Thanks a lotAnonymous
February 08, 2013
i clicked properties but sill unable to unblock it via clicking unblock tab on win 7.. whts the reason?Anonymous
February 18, 2013
Hey @john - You may have to be an administrator on the Machine.Anonymous
April 17, 2013
Nice. I had so much other stuff to do that when the Help didn't work, I just gave up on ProcMon. Now, a few days later, I had a few minutes and found your blog page. Now I have Help! Thanks!Anonymous
May 17, 2013
The comment has been removedAnonymous
June 13, 2013
Yes, it worked. Thanks a lot.... :-)Anonymous
August 09, 2013
..."typing <<Path so streams>>streams.exe /d *.chm.." That fixed it for me. Thanks!Anonymous
December 12, 2013
Streams worked perfect. Many thanks.Anonymous
February 09, 2014
ThanksAnonymous
March 04, 2014
Thanks, It worked for meAnonymous
June 18, 2014
Thanks alot. You save me lot of headache when trying to open Python 3.4 ref manual. tnx....Anonymous
July 13, 2014
Thaaaaaaanks alot.. I am reading the help file now : ) u save me a lot of timeAnonymous
July 16, 2014
Thanks this helped meAnonymous
July 25, 2014
thanksAnonymous
July 25, 2014
thanks alotAnonymous
October 02, 2014
I didn't have a FAT formatted drive available, so I copied the file off to the DVD (which is UDF format), and copied back. Now works like a charm, off the DVD too by the way :) Thanks Jeff for pointing the way forward.Anonymous
November 03, 2014
Thanks! I searched Google for -- how to read a chm file in windows 7 -- and this page was the 8th search result. Most of the other results were for programs that would read chm files. I thought there was an easy way. I just couldn't remember what it was. Very easy... go to properties and click unblock.Anonymous
February 23, 2015
Thanks for taking the time to post this, helped me out : )Anonymous
April 20, 2015
Win 7 - I had a similar problem, except the above answers did not work for me. The right pane was blank, no error message displayed. Logged in as an Administrator, but there was no "Unblock" button under Context Menu > Properties > Security. My problem was accessing the .chm file on a network share on my NAS. Simply copying the file to a local drive worked OK!Anonymous
November 18, 2015
Thanks, it workAnonymous
January 14, 2016
Jeff Sanders - Thank you, all other options were not workingWAnonymous
February 18, 2016
The file must be on a local computer. Not a Network drive.Anonymous
September 15, 2016
Yes, some of our problems actually enjoy a rather simple solution!Thanks!Anonymous
September 19, 2016
Thanks ever so much...Was completely lost as to why this was happening.Anonymous
February 17, 2017
Perfect!! Appreciate the knowledge share!Anonymous
June 21, 2017
Worked fine for me (on a Windows7 professional) via the "Properties" tab, thanks!Anonymous
January 17, 2018
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