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Cannot Open HTML Help Files

It's a known issue that sometimes the topics in a .chm file cannot be viewed after download. This problem was introduced with a Windows update to reduce security vulnerabilities in HTML Help.

As a resolution for end users, one of the following methods should be used after successful download of a .chm file.

Method 1

  1. Double-click the .chm file.
  2. In the Open File-Security Warning dialog box, click to clear the Always ask before opening this file check box.
  3. Click Open.

Method 2

  1. Right-click the CHM file, and then click Properties.
  2. Click Unblock.
  3. Double-click the .chm file to open the file.

Related Microsoft knowledge base article can be found here:

Using splitted Archives with IZArc

See the tutorials page on the IZArc homepage.


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