Hi gusgestal and welcome to the SevenForums.
First, be happy. Your Windows is using only a fraction of the installed memory. If you are interested to see what's eating RAM up, open Task Manager, click Processes tab and click Show processes from all users.
Secondly, you are a new member and not yet so familiar with the forum rules and guidelines. It is not good all you three posts are the same, spread over three threads.
When you have an issue, check first if there already is a thread about that. The SevenForums has a good and working search system, which you can fine tune to find specific posts and threads by clicking Advanced Search.
If you do not find the solution to your issue, start a new topic. Try to find the essence of your issue to give a good explanation already in the subject line. It helps us other members to find it and maybe give you a solution or at least suggestions.