Support Windows 2008/7 and above

Probably about time that we supported versions less than 10 years old :)

Author: mubix

modules/post/windows/gather/enum_ms_product_keys.rb

@@ -31,6 +31,7 @@ def app_list
 
     keys = [
       [ "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion", "DigitalProductId" ],
+      [ "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion", "DigitalProductId4" ],
       [ "HKLM\\SOFTWARE\\Microsoft\\Office\\11.0\\Registration\\{91110409-6000-11D3-8CFE-0150048383C9}", "DigitalProductId" ],
       [ "HKLM\\SOFTWARE\\Microsoft\\Office\\12.0\\Registration\\{91120000-00CA-0000-0000-0000000FF1CE}", "DigitalProductId" ],
       [ "HKLM\\SOFTWARE\\Microsoft\\Office\\12.0\\Registration\\{91120000-0014-0000-0000-0000000FF1CE}", "DigitalProductId" ],