Hi Sorashiro. I'm Greg, an installation specialist and 9 year Windows MVP, here to help you.
You have Memory errors which may require isolating the stick at fault and then replacing it, or both.
To refine the results test your RAM overnight to stress it with a more reliable bootable test, following these steps which test both the sticks and the slots: http://www.sevenforums.com/tutorials/105647-ram...
You can also scan your RAM with Crucial Memory Scanner to make absolutely sure it's spec'd correctly and to learn what exact RAM is needed for that PC so you can easily order high quality budget RAM if required: http://www.crucial.com/systemscanner/
I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.