I have bought a new Acer eMachines d725 laptop and this laptop was running Windows Vista on it. But as I am in love with Windows 7, I have installed the Ultimate version of Windows 7 on this laptop. But since I have installed this operating system on my laptop, It is not booting up at all. Can you guys tell me what could be the reason for laptop not booting up for with windows 7 operating system.
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