<i>Windows XP CD, there was still about 30 megabytes of storage capacity remaining.</i><p><i>Somebody decided to fill that extra capacity on the CD with dummy data and to have the Windows Setup program verify that the dummy data was still there.</i><p>Really? This feels like a Microsoft urban legend. I'm not convinced because I have an original ISO image of the first release of Windows XP Pro and it is (~500MB) much smaller than the size of even the smallest regular CD. It works, I've used it for many installs.<p>Edit: in fact only the i386 folder on the CD, which is < 500MB, is needed to install XP so if there was a hidden copy of Bob in there, it certainly doesn't fit the "30MB remaining" nor are there any files in there which are of that size with the exception of the ~75MB driver.cab; the latter contains only device drivers and the biggest one, te_protu.qm, appears to be ISDN modem firmware.