Did you install the video driver? What you describe sounds awfully like XP is using an unaccelerated video driver. A lot of people forget they have to install drivers after reinstalling Windows, and mistakenly think Windows will do it for them. Your job is to figure out what kind of video card or chipset you have. Then track down and install the latest drivers for it.
I just re-installed Windows XP on an old computer, and have been having issues with scrolling. It?s difficult to describe the problem ? when scrolling up or down in any program the screen sort of...wibbles? Blinks? It?s as though the screen can?t keep up with the scrolling. I thought it must be a driver issue, but the device manager doesn?t indicate any problems. I didn?t have this problem before re-installing, and there are no other issues with the computer at all. Any ideas?