The Answer, At Last

It happened in Seattle. It took an unlucky combination of people meeting
together in one of the Microsoft executive suites. First, there were the
Scotlanders recently responsible for the cloning of the sheep. In
addition, the group was blessed with Chrysler Motors ex-CEO, Lee Iococa,
and with the famous vampire, Count Dracula. 

Oh, the pain, oh the difficulty of sitting down. DNA was taken from both 
Iococa and Dracula and the DNAs were combined into the empty ovum of a 
Microsoft executive.

The fertilized ovum was implanted in a conscripted volunteer, and after
nine months, the conceptus came fully to term. Thus, it was born. Now we
have the explanation : ... AUTOEXEC.BAT