By Foo Yun Chee LUXEMBOURG (Reuters) – U.S. chipmaker Intel lost on Thursday its challenge against a record 1.06-billion-euro ($1.44 billion) fine handed down by European Union antitrust regulators five years ago for blocking rival Advanced Micro Devices . The European Commission in its 2009 decision said Intel tried to thwart AMD by giving rebates to PC makers Dell, Hewlett-Packard Co , Japans NEC and Lenovo for buying most of their computer chips from Intel. The EU competition authority said Intel also paid German retail chain Media Saturn Holding to stock only computers with its chips. Judges at the Luxembourg-based General Court backed the Commissions decision.