Can i install windows xp in my sony vaio model no. e-450?

go yo sony support site and download all the drivers for winxp for your computer model. put them on a usb stick.

Before installing windows xp, create recovery discs (about 4 dvds) in case you need to restore it back. And copy all you data to another drive. Installation of winxp requires a reformat of harddrive.

Any reason to use winxp? There is no more support from MS.