Windows update does not offer Vista service pack 2

Hello, some time ago I realized, that there is surely a SP2 available
for my Vista home premium 64bit. To my surprise I realized it is
available, but windows update does not offer it to be installed! What
can be the problem? I have Build 6001: Service Pack 1
I know I can download and install SP2 manually, but as an IT
professional I am really curious why isn't it in the windows update
offerings. I tried also this utility: http://support.microsoft.com/?scid=kb;en-us;947821&x=11&y=7
and it did not find any problem...

 

See http://support.microsoft.com/kb/948343/ and check that your system
qualifies for the service pack to be offered from Windows Update.

 

Try that link just listed then just go ahead search for the SP2 & down-
load manually. My HP PC's both desk top & laptop didn't do either on
their own. No explanation from HP can be given.

 

SP2 for Vista is offered on TechNet:
http://technet.microsoft.com/en-us/windows/dd262148.aspx

You don't need a TechNet account, just click on the package you want to
download.

 

Hello, unfortunatelly this applies to SP1. I did not find SP2 version
of this article and those advices seemed not to apply to my case.
Anyway I have lost my patience and installed SP2 manually. So I guess
I will never know what was it :-]