What is what is microsoft gfxui

This error comes up with Intel GUI Graphics interface. You need to reinstall your Intel drivers. Some users have also stated that it could be an issue with the Microsoft .NET Framework.

I would start with the graphics driver.

Since your a self proclaimed 'novice,' I'm going to guess that you have an OEM (HP, Dell, Acer...etc) computer. Go to their website, and look up your specific model. It'll probably ask you for your version of windows. Put that in. Then look for the graphics driver. Download, and install that.