Downgrading is a huge hassle that requires having the proper "license rights", the purchase of Windows 7 Professional at 9 for the OEM version, or 9 for the full retail version, phoning home to Microsoft for permission to do what you want with your own computer, and then installing it.
The OEM version comes with no technical support; otherwise it's pretty much the same as the full retail version.
After installing XP on my new Vista laptop I was absolutely astounded by the speed and performance when running XP over Vista.
Then you just use the program n Lite to burn the new XP CD.
(Desktops can come too) For this project you will need a PC running Vista, an internet connection (I bet you've got this ; ) and one copy of Windows XP with service pack 2 if possible.
If there is anything I have left out or any additional information you can provide please let me know. However if you do, I assume you know what your doing and don't need this guide. I know you haven't done this, so now is a good time to do so. Word docs, Excel files, i Tunes music, MP3s, home movies, and saved games.
You’ll find the pertinent information on the System and Display tabs.
With this noted, compare your current components to the requirements for Windows 7 or requirements for Windows 10.