iglvzx's answer is the way to go si vous voulez a permanent option in the shutdown menu. This covers the 'once in a while', 'temporary' and 'J'utilise Win7 Home so Je n'ai pas gpedit' areas.
Windows 7 Shutdown Dialog
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Assurez-vous either your desktop or taskbar is in focus. Clicking on the desktop background or on an empty part of la barre des tâches is enough. Sinon, the raccourci clavier Windows + D will work.
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Press Alt + F4.
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Vous devriez now have this box:
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Windows 7 Security Screen
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Press Ctrl + Alt + Delete to get to the security screen.
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Cliquez sur le arrow next to the shutdown button.
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Vous devriez voir this context menu:
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Turn off automatic updates
This is not temporary, but it is a viable solution for Home users. If you switch your update settings to anything except automatic updates, your shutdown will not install updates. Cependant, if you manually installed the updates, shutdown will still allez dans the configuring updates screen as usual. Also, be sure to actually install the updates as often as possible.
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