Mouse Pointer not Aligned

I have this problem for a couple of days trying to figure why my mouse is not aligned. I have a Dell Vostro 400 using Windows Vista Home Ultimate. I have tried different kind of approached install / uninstall some of my programs but it’s the same problem using MSExcel and Paint it’s a disaster coz, I cannot properly point the mouse. I tried different forums in the internet go to mouse setting check and uncheck this….. But it’s still the same, so I decided to format and re-install Windows Vista. I install the drivers one by one until I notice some difference in the Display card when I did not install the driver of my VGA card its ok everything is working, mouse is totally align. Therefore I conclude that my problem is the driver of my VGA card. Sorry, I forgot to mention that I install external Graphic Card it’s an ATI Radeon HD2400. Well what I did I replace my display card with a new NVIDIA Display Cards. After that its magic everything works fine. Well I guess on this problem you just need to get latest Display Card Drivers. I think there is driver compatibility issue In Windows Vista. Hope this may contribute and help you on this problem……