I already gave it to the computer store and they said that there is no problem with the hardware (maybe they are wrong).
I also make fresh installation of windows xp again and reinstalled my applications.
What happen is that about two or three times a day my windows xp freeze, and then I need to make restart.
I already got the latest windows xp updates and I've also tried to replace my antivirus and firewall.
What can I do about it?