I have a Hitachi Visionbook Pro 7775 notebook, and it came without an OS. The native OS is win95/98, but when I boot those up on the notebook the pointer runs really choppy. Even with Windows 2000 the pointer still doesn't run right. I tried booting Windows XP Pro SP2 on the notebook, and Wha La! The pointer now runs perfectly when I operate the touchpad. Now I would normally just keep this like it is, but since I don't have enough resources to run XP. I think it has something to do with the drivers, but I tried putting in updated ones and even using Windows Update. It just comes up as a standard Microsoft PS/2 mouse in each operating system I've installed it on.