How to Change the System FONT in WINDOWS.
Here's the code you wanna paste into the NotePad.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts]
"Segoe UI (TrueType)"=""
"Segoe UI (TrueType)"=""
"Segoe UI Black (TrueType)"=""
"Segoe UI Black Italic (TrueType)"=""
"Segoe UI Bold (TrueType)"=""
"Segoe UI Bold Italic (TrueType)"=""
"Segoe UI Historic (TrueType)"=""
"Segoe UI Italic (TrueType)"=""
"Segoe UI Light (TrueType)"=""
"Segoe UI Light Italic (TrueType)"=""
"Segoe UI Semibold (TrueType)"=""
"Segoe UI Semibold Italic (TrueType)"=""
"Segoe UI Semilight (TrueType)"=""
"Segoe UI Semilight Italic (TrueType)"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\FontSubstitutes]
"Segoe UI"="Franklin Gothic"