Hi, Peter.
I assume you mean Start | Accessories | Command Prompt. I use this "DOS"
window every day (both before and after SP2) and haven't had this all-blank
problem. It's hard to see how SP2 could have affected this, and I haven't
seen anybody else report anything like it.
My best guess is that you need to right-click on Command Prompt, then click
Properties and adjust the settings. You may have made the Command Prompt
screen larger than your actual monitor size, putting the prompt off-screen.
Or, you may have set the background and foreground to the same color; if
that's the situation, the prompt is there, but you can't see it.
Did you make any changes to your Display Properties? Graphics driver? Any
other recent hardware or driver changes?
RC