If you work someplace that allows you basic administrator privileges, or just has a friendly systems administrator, it isn't very difficult to change the keyboard layout in Windows. It can be set on a software level, or you could just bring a Dvorak keyboard in to work.

Unfortunately, half the jobs I've had wouldn't allow this, so it's not a guaranteed solution. And the software switch is only useful if you have a cover you can throw over the existing keyboard, or can touch-type sufficiently well.

Still, don't think being employed eliminates the Dvorak option. I looked in to it just recently to make sure that learning Dvorak wouldn't give me too much of a headache at work :)