i have setup the windows but i have forgette to setup arbic language how i can setup the arabic language?

i have setup the windows but i have forgette to setup arbic language how i can setup the arabic language?

شغلتك بسيطة

فتحي: start \ control panel \ date , time, language and regional options \ Regional and Language Options

فتحي صفحة Languages
فعلي خيار install files for complex script and right-to-lift languages وكبسي apply
وبعدين افتحي Details وضيفي اللغة العربية
وبعدين روحي عال advanced وفعلي الخيار
20420 (IBM EBCDIC - ARABIC)