The Windows operating system is based on Unicode, but does not display the code page used by the operating system in the environment settings. However, you can make an educated guess based on the country in which you purchased the system and the language the system uses.
If you purchase Windows in the United States and use English as an input and display language, your operating system code page is MS Latin1 (MS1252) by default. However, if you install additional display or input languages from the Windows installation CD and use those languages, the operating system might use a different code page.
For more information about the default code page for your Windows system, contact Microsoft.