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In the past day the wifi download speeds of my Win 7 HP 64 bit laptop have slowed considerably. I am trying to troubleshoot the problem and to figure out whether it's hardware related (i.e., is the Intel(R) Centrino(R) Wireless-N 2230 the problem?) or router related.

I have a Netgear N300 router connected to my modem. I'm using Speedtest to measure my speed.

First, during my problem state, my ipad can download and upload at normal speeds. It's only my Win 7 laptop which is having problems.

Because my ipad downloads at normal speeds, that would tell me that the problem is specific to the laptop (either HW or SW). But when I restarted my Netgear router, the laptop wifi problems disappeared.

That just doesn't make sense. If we know that one device can connect properly to the router, why would a laptop have problems?

What are some possible reasons why this might happen? Also, during my problem state, I noticed that on my laptop upload speeds were faster than my download speeds. Anybody have a guess about what might cause upload speeds on one device to be faster than another?

Is there any actions i could take (or options to enable) so this problem won't occur.

(I initially thought my problem might be software related or memory related -- Norton AV or browser plugins. But even after I disabled everything and made sure memory footprint was minimal, the slowdown was still occurring -- and it solved itself altogether when the router was reset).

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Make sure your router is using the current firmware. –  Ramhound Jun 27 '13 at 15:38
    
Also make sure your laptop is using the latest driver. –  dusan.bajic Jun 27 '13 at 15:57
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2 Answers

I took a quick look over at Netgear's site and found this little bit which clearly applies to your situation. The intel Centrino chipset has a tweak or two needed tosolve the problem.

http://kb.netgear.com/app/answers/detail/a_id/20923

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I think your problem may be related to interference of your Wi-Fi signal from other electronic devices. By default, the Wi-Fi channel is set to auto so every time the router is rebooted, the channel will be different. I guess that explains why it worked when you reset.

If you change the router's channel, you may observe a significant difference in speed.

This link helped me a lot.

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Wow, interference -- I never thought of that! I'll have to investigate and report back... –  rjnagle Jun 27 '13 at 18:15
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