I'm trying to upgrade my Windows 2000 Professional. I installed windows service pack 3 once already but after i did that none of my games would play. I kept getting warnings that I need at least 10mb of memory on my video card to run my games. I have a nVidia Gforce 4 4600 video card that has 128mb of RAM. How can this be fixed and can i install the other service packs and be able to run my games?