بسم الله الرحمن الرحيم
السلام عليكم ورحمة الله وبركاته
السلام عليكم ورحمة الله وبركاته
Here is a tutorial how to get Arabic typing working on your computer
http://zsigri.tripod.com/fontboard/arablpk.html
You may not need to follow the first four steps, it depends, so you can try missing them out and if not then go back and do the first part.
Insha`Allah I hope it works for you
If you really can't get it to work, there is always the option of Online virtual keyboard
http://virtual-keyboard.imtranslator.com/
or
u can used Arabic keyboard
http://www.al-islam.com/key.htm
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i leave u in care of Allah
<wasalam>