11A) Set the ISAPI Filter

These installation steps will cause PHP to perform HTTP Authentication.  If you do not want PHP to perform HTTP Authentication, the PHP manual says we "should" skip these steps.

Open the "Control Panel" window (A) and double click on the "Administrative Tools" (B).

... and in the "Administrative Tools" window (C), double click on "Computer Management" (D)... 

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Another way to get to the "Computer Management" window (E) is to right click the "My Computer" icon on the desktop and click on "Manage" in the pop-up menu. 

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In the "Computer Management" window (E), expand the "Services and Application" node (F) and the "Internet Information Services" node (G) to finally select the "Default Web Site" node (H).  Right click the "Default Web Site" node (H) and select "Properties". 

In the "Default Web Site Properties" window ( I ), click on the "ISAPI Filters" tab (J) and click on the "Add" button (K)

Continued in the next page...

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Previous Step: 10) Tweak the Window's System Registry 

Next Step      : 11B) Set the ISAPI Filter (continued)