I dont know nothing about computer. I tried to re-install window xp on my computer by recomendations because running slow and a friend of my recommended to me. well I start and on the installation start to install all the drivers but at the window set up the computer freeze. what I can do?

Was XP pre-installed on this computer (OEM)? If so what is the make and model? Have you checked the manual and or the manufacturer's web site for specific Recovery instructions?

If you are using a retail version XP CD then here is a good guide:

http://michaelstevenstech.com/cleanxpinstall.html

Click on: Click here to skip to "Steps to Clean Install XP"

In general Setup failures with Microsoft XP CD's are hardware issues.