HP ProCurve NAC 800 User Manual page 240

End-user Access
End-user Access Windows
TIP:
5-32
If Active Content is disabled in the browser, the following error window
appears:
Figure 5-19. End-user Agent Installation Failed
To enable active content, see "Active Content" on page C-4.
If this is the first time the end-user has selected NAC Agent test, a security
acceptance window appears. In order to proceed with the test, the user must
select to Install the digital signature.