For PC : Control Panel\Appearance and Personalization\Personalization ,click on theme and make font changes to elements that use fonts.
by going on setting and chose fonts and then font revoling then fix it
Start, control panel, display, apperance
To change the font size go to the control panel and type 'make text larger' in the search bar in the top right corner. Then in the results, under display click 'make text and other items larger or...