http://msmvps.com/blogs/installsite/archive/2007/08/31/1152764.aspxWhen the beta of Windows Installer 4.5 became available , first thing I did was downloading the white papers and the SDK documentation, which comes as compiled HTLM Help file msi.chm. But when I launched the help file it didn&#39;t work. When I doubleenCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/installsite/archive/2007/08/31/1152764.aspx#1168911Wed, 05 Sep 2007 22:00:35 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1168911Christopher Painter<p>A tool that I never noticed before...</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1168911" width="1" height="1">http://msmvps.com/blogs/installsite/archive/2007/08/31/1152764.aspx#1164456Tue, 04 Sep 2007 16:56:53 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1164456Richard<p>I believe you can also get there by unchecking the &quot;Always ask before opening this file&quot; checkbox when you double click the .chm.</p> <p>What&#39;s really happening here is that IE7 adds an additional data stream to any file that it downloads. &nbsp;The additional data stream marks the file as originating from the internet and containing possibly hostile content.</p> <p>See <a rel="nofollow" target="_new" href="http://msdn2.microsoft.com/en-us/library/aa364404.aspx">msdn2.microsoft.com/.../aa364404.aspx</a> for more information on file streams. &nbsp;They&#39;re a relatively unused feature in Windows, but if you ever wondered where all that metadata that&#39;s shown on the property page for your readme.txt was stored, now you know.</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1164456" width="1" height="1">http://msmvps.com/blogs/installsite/archive/2007/08/31/1152764.aspx#1154422Sat, 01 Sep 2007 09:16:33 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1154422stefan<p>I learn something new every day - thanks!</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1154422" width="1" height="1">http://msmvps.com/blogs/installsite/archive/2007/08/31/1152764.aspx#1153383Sat, 01 Sep 2007 00:43:19 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1153383dmurillo<p>Hi Stefan,</p> <p>You can right-click on the file to open the file properties dialogbox, then click the &quot;Unblock&quot; button and that should do the trick :-)</p> <p>DM</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1153383" width="1" height="1">