Microsoft keyboard problem

Ok i have a microsoft keyboard for my desktop, its XP home edition. And its typing different letters than it should be, like when i press "S" it shows "P" on the screen. Please help.

NOTE: i already tried setting the language to English (US)

Hello,

Please try installing a keyboard driver. Use Intelli Type Pro:

http://www.microsoft.com/hardware/download/download.aspx?category=mk