>I use in in my fast desktop. Works fine. I also installed it in my notebook, an older Dell P4 800Mhz 128 RAM and it is so slow it's unusable.
According to the stated minimum requirements, I would suspect that in this case it is the memory which is insufficient, more than the speed.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)