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1 Opening CHM Files in Vista
2 ==========================
3 :author: Aaron Ball
4 :email: nullspoon@iohq.net
5
6
7 == {doctitle}
8
9 If any of you have been following me on Twitter recently, you know I've been
10 researching the installation of TFS. I had pretty good luck with a lot of
11 websites regarding TFS 2008, but not so much with 2010 Beta 1 (naturally). The
12 only source for detailed documentation was Microsoft, so I went with what I had
13 and downloaded the document. If you hadn't guessed yet from the title of this
14 post, the file had a .chm extension. After downloading the .chm file, I
15 proceeded to open it. Much to my dismay, it opened but the pages would not
16 load. I was getting 404 errors on every topic. After spending a few hours
17 searching, I found a solution. Apparently the .chm extension is not secure and
18 Vista removed the ability to read files like that unless they are in a
19 specified 'safe' location. I don't particularly want to have to download any
20 .chm file to an obscure location and then have to find that location again to
21 open the file. Naturally, I searched for a simpler solution.
22
23 The solution I found, simpler or no, worked. You guessed it...it's a registry
24 hack.
25
26 I have a theory that one can literally do anything with registry hacks...things
27 like make pigs fly or make hell freeze over.
28
29 Here's what to do:
30
31 1. Right click your .chm file and select *Properties*
32 2. Click *Unblock* and select *Apply*
33 3. Open up *Regedit*
34 4. Modify the DWORD *MaxAllowedZone* to equal *1* (if it doesn't exist, create
35 it)
36 5. Close all Internet Explorer Windows and start up your .chm file
37
38 That's all there is to it. I haven't had any problems with any .chm files
39 since.
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