I'm just wonderring if I have to install a new installation of Windows if I'm just upgrading processor/memory. I know that I would have to with a new motherboard, but I'm just going from an AthlonXP 1700+ to an AthlonXP 3000+. Also, would the jump from a 266 FSB processor to a 400 FSB one change anything in terms of myself manually switching jumper settings on the motherboard or in the bios, or should everything work automatically?