windows 7 won`t let me go back to xp

[randomlight]

I loaded windows 7 on my compaq desktop but now it works really slow.When I put my xp disk in to change back to xp it says I can`t install an older windows version.Unfortunatly I deleted the old computer files in windows7 already.Is there a way that I can just format my hard drive and start from scrath .Any help would be so appreciated thanks

 

[diduknowthat]

Put the CD in during startup and boot from CD. Try to install it that way.

 

[randomlight]

thanks so much .works fine that way...where would we be without kind sharing souls like you. thanks again