Downgrade windows 7 or w. vista to Windows Xp

sometimes we confusing how to downgrade operation system which is recent using windows 7 because of something reason of us we would like to downgrade its system operation system to windows xp which is notabene more lighter, simple and easy to operate than windows 7 or windows vista, as we know that windows 7 or windows vista so much using animation and 3D of visual that is make it more oppresive in every load of running.

opposite of that lacking of that windows 7 ofcourse has special qulity one among them is they are looking so beautiful of view because of 3D visual and animation.

to down grade its operation system actually its quite easy, we just need to change AHCI mode on BIOS system form SATA to ATA. its simple right?

after that we can just installing operation system like we use to..

don't forget to make it easier to installing windows xp from the first booting change to CDROM/DVD and the second booting to hardrive of BIOS system.

Good luck!