Support
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
- Double-click the .chm file.
- In the Open File-Security Warning dialog box, click to clear the Always ask before opening this file check box.
- Click Open.
Method 2
- Right-click the CHM file, and then click Properties.
- Click Unblock.
- 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.