Error: font family not found in Windows font database

[ArthurZ]

On Windows 7 64 Pro, up-to-date, latest R, no matter what font I choose I get error:
"font family not found in Windows font database"
The fonts tried: Arial, Courier, etc. that are indeed registered in the system.

[Arvinlike]

Hello, my computer is Windows 10, at begin i face the same problem, later , i add a line of code
like "windowsFonts("Arial" = windowsFont("Arial"))",
you can try it

[GuangchuangYu]

the post, https://stackoverflow.com/questions/34522732/changing-fonts-in-ggplot2, is also useful.