Ive been using Windows 7 x64 now for about a year, and Ive been noticing something that is rather irritating. When I right click, Windows just hangs for a few seconds, until the menu comes up. When I go to copy or move files, it hangs for a moment before finishing the transfer. Its not instant like it is on my Vista machine.
Is this a problem with my memory (or an incompatibility), and does anyone know a fix to this?

I really dont want to reinstall Windows, because its my main computer I use now.
Also, as a second part to my question, Im considering upgrading my ram from 4gb to 8gb. Will this fix the problem?