Opening HTML Help files (*.chm):

Microsoft has recently introduced a security update that can prevent HTML Help files (*.chm) from opening correctly. Please read the information below carefully if you are experiencing problems with opening any of Intech Instrument's help files (*.chm)
[i.e. only blank pages appear]:

Resolution for end users

Warning

If you are prompted to open or to save a .chm file from a Web site, you should do so only if you need the file and if you trust the Web site that is providing the file.

In the File Download dialog box, click Save, and then choose where you want to save the .chm file. Then, use one of the following methods:

Method 1

1. Double-click the .chm file.
2. In the Open File-Security Warning dialog box, click to clear the Always ask before opening this file check box.
3. Click Open.

Method 2

1. Right-click the CHM file, and then click Properties.
2. Click Unblock.
3. Double-click the .chm file to open the file.

More detailed information about this issue is available on Microsoft's website via this link:
http://support.microsoft.com/kb/902225/