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If you’ve downloaded a .chm file, but on opening it, can’t see anything, I have a solution for you πŸ™‚

Ta-da

  • Right click on the file >Β Properties
  • Find the “Unblock” button, and click it.
  • Re-open the .chm and it should now display properly πŸ™‚

Written by Phil Wiffen

Phil is an IT Professional working in Cambridge, England. He generally blogs about useful solutions that he comes across in his work/play.

29 Comments

Nick

Hmmm…got the same problem (WinXP SP3) but there is no ‘Unblock’ button…:(

Steve Ballmer

The mind boggles. Where is the dialog to warn you when you open the chm? This is good example of the decline of MS products. They are so big one hand does not know what the other is doing. MS is well on their way to becoming the next IBM.

Supernan

thanks a lot. It took me 3 hours about this “Unblock” problem you are great raise the roof

anupam

thanks a lot dear. you deserve it. i have deleted so many such files before just because I never knew this.

Makai

Waaaaaah…thanx a lot!!seeing the unbelievably simple steps, i feel like a total noob =.=…

Darya

Thank you very much i had a CHM file and did not view the text then i UNLOCKed it and now is working…….

Byron

in case unblock does not work or is missing – and particularly for downloaded chm files from newsgroups or torrents, first scan for malware–then –Microsoft no help. This worked for me in XP (not sure about Windows 7) Go to Google, search for UniExtract otherwise known as Universal Extractor —it was free last time i looked, download, install, set to include context menus. Then right click a .chm file and the context menu choices should appear if installation was successful —left click on extract to subdirectory, this means that the file will be extracted to a new folder same name as the .chm file. Open folder and your goodie file should be there as an htm, select the initial TOC, table of contents, left click it and it should open in your default browser, use “next” key buttons to scroll thru to your next page, so on and on.

Zh

Thank you very much your great idea, I struggled a couple hours to figure out how to fix this problem which the downloading just provides this kind of broken file, finally I thought how to fix the broken file, then found your solution. In fact, I have many of this kind of chm file would not be able to open, now your solution will be help me a lot to open other chm files in my archive. Thank you again!

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