Microsoft is effectively pulling off its life support for Windows XP Service Pack 2 (SP2) and Windows Vista RTM this year.

On Windows website,

As we announced in 2008, support for Windows XP Service Pack 2 (SP2) will end on July 13, 2010. Support for Windows 2000 will end on the same date. Support for Windows Vista Release to Manufacturing (RTM) will end on April 13, 2010.

Updating your Windows XP, Windows Vista and Windows 2000 PCs before the end of mainstream support dates will ensure your PCs stay supported and receive security updates. The best way to be secure and supported is by migrating to Windows 7.

As of this writing, Villman listed Windows 7 Professional (OEM) at PhP 8,277.00.