@D1NACALIENTE Your dxdiag lists a crash of Sims 3 related to the Nvidia graphics driver, which is also very much out of date. So please install the newest-available driver from Nvidia:
https://www.nvidia.com/Download/driverResults.aspx/145874/en-us/
Run the installer as an admin: right-click the download and select "Run as administrator." Choose the Custom (not Express) install method, and check the box to perform a clean install. Restart your computer afterwards and before trying to play.
When you do run Sims 3, please first restart your computer, and don't open any other apps at the same time. With only 4 GB installed RAM, you'll want to cut down on memory use as much as possible to leave whatever you can for the game itself.