Microsoft has released Service Pack 2 for Windows Vista and Windows Server 2008. The update adds support for additional hardware and standards, including 64 bit processors from VIA.
The update also includes Windows Search 4.0, which is the latest version of Microsoft’s desktop search client, plus improved WiFi performance after resuming from sleep mode. In order to install Windows Vista SP2, you’ll need to have Service Pack 1 installed.
You can download Windows Vista SP2 here.
You can also read more Information about Service Pack 2 for Windows Vista and for Windows Server 2008
Read more here: Microsoft releases Windows Vista SP2