In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Dunnsept wrote: .chm is a compiled help file. Some of the later windows security "fixes" broke CHM files because there are serious security vulnerabilities in them. there are 2 things to try. First right click the file and then choose Properties, if available, uncheck the "unblock" if it's there. If this does not fix it, try (from a command prompt) regsvr32 itss http://support.microsoft.com/kb/902225 for more info ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=119568#m119851 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)