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This question already has an answer here:

I would like to download files from the intelernet on my lenovo laptop with windows 7 when the lid is closed. Unfortunately the download slows down almost to zero when the lid is closed.

Answers to almost the same question sugest preventing preventing the computer from sleeping and looking to power configuration.

Please advise me what to do. Here is setup telling windows not to sleep: The-computer-is-set-up-to-do-nothing-when-I-close-the-lid picture.

Here are the advanced power configurations:

advanced power configuration also tells to do no action on closing the lid

I haven't observed that this problem depends on plugging the laptop to electricity. Thanks in adcance for any other suggestions and help.

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marked as duplicate by Karan, Breakthrough, Tanner Faulkner, Ƭᴇcʜιᴇ007, Journeyman Geek May 30 '13 at 8:35

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Or if you want to draw attention to the question, you can bounty it when you have enough rep. – Tanner Faulkner May 29 '13 at 17:05

One possible cause might be that the wifi-antennae on laptops most often reside in the screen, so the efficiency of the antennae might be severly reduced by closing the lid, increasing the interference and "shielding" part of the signal, try to see if the same happens when using a cabled connection.

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That would best describe the issue. If not, try a 2nd OS, some Linux and test it. Usually it should not give you a different result if OS is configured properly and if so then it's down to the antenna. Or get a hard-line and test it with that. If there's no slowdown then it's definitely the antenna. – JasonXA May 28 '13 at 1:36

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