I bought a PC with 8 GB RAM. I installed Windows 7 in it, and now its showing that only 3.9 GB of RAM are usable? What about the remaining RAM? Is
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![8GB RAM installed, but showing only 3.98GB usable [Solved]](https://img-16.ccm2.net/oAgJLsXPzi1dQZjAE1hDnOldk54=/bb8a542c99f24a37a8c5a835705dceb4/ccm-ugc/AT28YDBb5Ik0VqPlMjqAhljbDWPz8v6RL-12.png "8GB RAM installed, but showing only 3.98GB usable [Solved]")