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Whenever I close the laptop and then open it, Windows comes up immediately, but the WiFi connection is not established for a well over 45 seconds.

All other devices (including another Windows laptop, iPad, iPod, etc...) connect immediately.
What could be the issue?

My MacBookPro is about 2 years old.

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@Karan That did the trick. Thank you very much. – AngryHacker Mar 9 '13 at 21:32
You're welcome, and I added it as an answer below. – Karan Mar 10 '13 at 0:01
up vote 5 down vote accepted

Check the network adapter's properties in Device Manager, and on the Power Management tab disable the option to turn off the device to save power:


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