This article only applies to users of Microsoft Windows XP with Service Pack 2 using Microsoft Internet Explorer version 6 web browser.
Your browser may ask whether you wish to open the file from it's current location or save the file to your local hard drive via a dialog box similar to this
You should select 'Run' as indicated with the red ellipse shown above. XP SP2 will then generate a second dialog.
Comparatively few non-Microsoft applications actually have a 'valid digital signature'. This does not mean non-signed products will harm your computer. So simply click 'Run'.