Hi
I've seen that when I've set the font size too large in graphics settings.
One program in particular that I use forced my to go back to have the setting at the default 100%.
Right Click on the desktop and click on Display Settings.
On the Display screen click on Advanced Display settings at the bottom of the screen.
Select Advanced Sizing of Text and other items.
In the copy at the top click on Set a Custom Scaling Level and see it it's set to %100.
If not change it to %100.
If it is already %100, go back to the previous screen and see if the Text size is all set to the default 9 points.
The other thing you could check is to see if your screen resolution is set to the default for your computer.
Change Display Settings...