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Est-il possible de switch entre Windows 7 Editions?

ayi

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Related question:
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Je suis actuellement running Windows 7 Enterprise RTM which is part of my MSDN subscription. Cependant J’ai besoin de downgrade to Professional on one of my machines. In Vista you could change entre certain editions by providing the clé de produit and re-activating, cependant this ne work in Windows 7.
Comment puis-je switch editions avec a valid clé de produit sans having to re-installer?

ayi_2

Downgrading to a lower SKU n’est pas possible, from what I know. Windows 7 Enterprise is a superset of Professional, so your seulement option is reinstalling, from my knowledge.
The same thing is true in Vista, vous pouvez seulement upgrade, not downgrade (Home Premium to Business was allowed, the other way around n’était pas allowed).
Modification : ici’s the official response from Microsoft, courtesy of <a href="http://blogs.zdnet.com/microsoft/">Mary-Jo Foley</a>:
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So the answer is no, you ne peut pas use WAU 
to move from Windows 7 Enterprise to 
Windows 7 Professional parce que that 
would essentially be a downgrade. 
Windows 7 Enterprise is just like 
Windows 7 Ultimate, all du 
fonctionnalités are part du SKU.
What WAU is meant to do is allow utilisateurs 
to add more fonctionnalités to Windows 7 by 
upgrading to a higher edition sans 
having to go through a time-consuming 
re-installation processus. Il y a a 
variety of scenarios in which a utilisateur 
may choose to upgrade après the 
initial purchase, including:
<ul>
<li>
A consumer purchases a PC pre-installé avec Windows 7 Starter 
and wants to turn it invers le best PC 
for entertainment.
</li>
<li>
A customer purchases Windows 7 Home Premium, but realizes they need 
Professional fonctionnalités including Domain 
Join, which provides the ability to 
add the ordinateur to a company or 
school réseau.
</li>
<li>
Someone 
purchases a PC pre-installé avec 
Windows 7 Home Premium and wants to 
experience of all of what Windows 7 
has to offer avec Windows 7 Ultimate.
</li>
</ul>