Nobody can tell you anything without exact system info or other technical details like version of AE, system language, keyboard settings or even what Windows(?) theme and DPI settings you use. Font rendering errors can have all sorts of causes, but you have so far not provided any useful info to allow anyone to help you.
Running windows 10 PRO
Theme - Standard
RAM - 16GB
Installed - After effects CC 2017 64
System language - English
Keyboard settings - English united states (I have even switched to English UK)
I have set a few of my specs below, please let me know if there is anything else that you need in order to help me. Thank you