Cant downgrade from Windows 7 to XP

Ive been trying to downgrade back to XP because Windows 7 runs so slow its not even funny. Well everytime I try to reinstall XP , I click the Install WIndows XP button and then it pops up "This program is blocked due to compatibility issues". I tried going under properties and doing the option:Run this program in compatibility mode for:, and it still doesnt work. Can someone please tell me how to get rid of this message or how to reinstall XP and by the way i am running XP setup not by disc but by .iso. Thank you

I assume that because you can not upgrade from XP to 7 that you can not downgrade to XP from 7. You are going to have to boot up with the XP cd and run a clean install.

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.