Open CHM Files from Network drive

I experienced a problem recently when trying to open a .CHM help file from a network drive.

The file opened, and I could navigate the topic tree, but I just got a "Page could not be displayed" IE page in the right pane.

I found the solution to my problem at http://www.nik.com.au/archives/2005/04/06/chm-help-files-error-the-page-cannot-be-displayed, in comments left by Anish and Jordan Wiseman

I have repeated this info here:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\ItssRestrictions
Note If this registry subkey does not exist, create it by using Steps 2a and 2b in Method 1.
3. Right-click the ItssRestrictions subkey, point to New, and then click DWORD Value.
4. Type MaxAllowedZone, and then press ENTER.
5. Right-click the MaxAllowedZone value, and then click Modify.
6. In the Value data box, type a number from 0 and 4, and then click OK.
7. Quit Registry Editor.

Value Setting
——————————
0 My Computer
1 Local Intranet Zone
2 Trusted sites Zone
3 Internet Zone
4 Restricted Sites Zone

For most CHM files, the value of 1 should be enough to allow use without opening up access from/to remote CHM files in email/internet locations.

Easy, peasy!