Good news for a change. I was building a computer with parts purchased from Scan when problems set in. The system was Athlon 2800, latest MSI motherboard and two sticks of 512Mb fast DDR memory. The fault was strange. With the motherboard set to normal FSB the BIOS reported the 2800 but Widows XP would not install - odd files were not copied. Set the motherboard to slow FSB and the BIOS saw a 2299 processor and nothing couls persuade it otherwise. Now Windows installed with no problems. Then odd crashes occured which became more frequent with a final boot failure. It might have been processor, motherboard or memory. Scan took them back without question and arranged collection as well They tested and it was the motherboard. Replacement followed so well done to Scan.