i've got a home windows host company and i'm moving to a different one. what's the easiest method to migrate a wordpress blog in one host company to a different ?

The Wordpress codex provides lots of info on the subject of moving a Wordpress. If you do not seem like reading through through all that, here is really a far shorter guide, that covers basically exactly the same method.

Google for this. I simply looked for "how do you migrate my wordpress"

http://www.google.com/search?q=how+do+i+migrate+my+wordpress

Whenever the chances are the issue you face is unoriginal, odds are someone's recorded it on the internet.