I am afraid Windows is not the issue. About the only thing you can do with that laptop is bump the ram up to 4gb if it is not already. You can also go into the graphics settings and select the Windows Classic theme. This guide will help you get the most of what you have currently. http://windows.microsoft.com/en-US/windows-vista/Optimize-Windows-Vista-for-better-performance
The real issue is the older processor and graphics. The only way to upgrade those is a new laptop.