Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.
Not using all your RAM under normal conditions is a great thing, it means you have more than enough. XP and Vista can both use a great deal of memory. If you have 32-bit Windows, you're capped at 4GB, if you have 64-bit, you can use about 128GB, depending on which edition of Windows you're using.