Korean symbols in Windows XP

[Kendall]

I keep getting some Korean language symbols in various
Windows programs. This is a new computer running XP Pro
and Office XP. Language is set to English of course, but
I get some Korean showing in some web pages where I know
they don't exist, and in my email messages that I send
out, and in some Windows programs.

How to stop this? I don't have any need for mixed
languages on my computer, and I have no idea why Korean
stuff keeps showing up.

Thanks
Kendall