You had to know it would be a matter of time. Not long after I wrote about the limitations of Vista’s upgrade version I found this. First let me reset. Previous versions of Windows upgrade versions would allow you to do a “clean” install (format the drive) if you had the previous versions install media at hand. The install would stop to validate the install media and you could proceed. Very handy if recovering from a full hard drive failure, virus infestation, etc. Well the word was, Vista upgrade requires the previous OS version that you upgrade from to be installed on the Hard drive. This makes the rebuild process from such failures sound VERY nasty and tedious (read: just go buy a new pc…) However….