This amazes me… 

“Microsoft has announced “Windows Vista” was actually a new type of computer virus created by disgruntled employees.  This new type of virus became so popular throughout Microsoft, that was mistakenly put on cds and shipped to customers.  Please be aware that “Windows Vista” is not a Microsoft supported operating system and rather a complex computer virus.  The virus apparently affects RAM usage and general PC performance.  Microsoft has provided a download to fix the problem.  Users with slower connections can contact Microsoft directly to order the cd.“

Via MS PressPass