If we want to change font khmer in Window 7 or Window 10 .We need to change in Regedit by run (regedit).
regedit-->HKEY_LOCAL_MACHINE-->Software-->Microsoft-->Window NT-->Currentversion
-->Font
After We need to change Khmer UI (True type) and Khmer UI bold(True Type) to KhmerOSsys.ttf
After that we need to restart the PC.
