Unable to open .chm HTML Help files

I just downloaded Technet Magazine – January 2007 HTML help file and when I opened, I noticed the topics in the .chm file cannot be viewed and I realized that it was getting blocked and all I had to do is to unblock the file (see the procedure below) and this time I can see the contents happily:-) 1. Right-click the CHM file, and then click Properties. 2. Click Unblock. 3. Double-click the .chm file to open the file. More information is available in the KB article – http://support.microsoft.com/kb/902225/EN-US/