black viper has been tweaking windows for a very long time, so you configure according to his settings, im pretty sure you're at the minimum for the OS to operate without problems.
btw, windows 7 is pretty smart with resources, if you have the appropriate hardware, itll configure it accordingly. as such, if you're running 64-bit, you should be at least 4gb of RAM with duo core or more, if not, 32bit will fit better.