Hi SaadAddin, Yes, you can install Windows XP professional on Precision T3500. Refer the following link which has step-by-step instructions to install Operating system: [URL] Once installing the operating system, update the drivers accordingly. Please reply if you have any further questions.
Hey Gentlemen,,, I just want to know if I can install Window XP Pro SP2 on Dell Precision T3500. I really appreciate your help guys    
Window XP Pro SP2 on DELL T3500