Monitor measures 19 x 12 HP S2031 came with computer when I bought it from Walmart. I am think it's 4 years old ? I am not sure how long I have had this. I am not sure where I find all the info on the computer at in the system I just don't remember where that is anymore. If someone knows let me know and I will tell you. 
The computer is connected to my internet so you can see that it does work. I will also restore this back to factory settings so it's how it is when you buy it. If you have question just ask and hopefully I can answer them for you.