I actually got around it by installing 98 first. But WTH? I had previously installed XP from the D: prompt (on a brand new drive), why wouldn't it let me last night? My OS was screwed up so I decided to do a clean install (I hadn't activated it yet, so I decided to put a fresh installation on before I activated it). I thre in a 98 boot disk, reformatted the drive, threw in the XP CD, and after changing to D: drive I typed SETUP. That's when I got the 'cannot be run in DOS' message. What'd I do wrong?