New
#1
Is there something stopping you from changing the resolution?
My partners desktop ended up a couple times (usually after insider preview updates) being shifted down to 1024x768 resolution which made everything absurdly large but each time he would just change it back up to 1920x1080. I think there was one time it wouldn't offer him the right res but doing a restart twice and it started offering the correct options in resolution for him.
Don't forget to update the video drivers as maybe what W10 has chosen may not be the best option.
My Windows 10 is only about 3 gb. Of course all of the other programs bump that size up a bit.
Sorry, not quite sure what your issue is. Right click desktop, Display Settings, and go from there. What you are showing is a cluttered mass of open windows. Can you be more specific? And, please, update your system specs. It makes giving help a lot easier if we know what your environment is.