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Windows 7: Can anyone explain this speed loss?

13 Feb 2012   #1
Microsoft MVP

Can anyone explain this speed loss?

I recently had to relocate my router to have a wired connection in the house, then returned it to where it was after the project was finished.

My laptop lost a lot of connection speed that didn't affect the other computers on our network. I had been getting "same IP address being used" errors on it during the project I was doing so I thought it was responsible.

When the problem persisted even after everything was set back as before I rolled it back to its last image but the speed remained less than half usual.

It seemed like the only cause could be a failing wireless adapter since the other computers on the network remained at the same speed.

As a last resort I clean reinstalled and now the laptop has regained all of its original speed. Does anyone have an idea what could have caused this since the problem persisted even after reimaging but corrected after clean reinstall?

My System SpecsSystem Spec
13 Feb 2012   #2

Windows 7 Ultimate SP1 - 64 Bit

I used to have this error on two netbooks at the same time:
same IP address being used
Can't remember what I did to fix it.

I think I tried resetting the computer and router and removing it from Manage Wireless Networks.
My System SpecsSystem Spec
13 Feb 2012   #3
Microsoft MVP


Error would go away when I'd restart it. My roommate had a new Ipad plugged in so it could have been that, or the PC I had here that I was working on.
My System SpecsSystem Spec

17 Feb 2012   #4
Microsoft MVP


A week later and the problem has returned to the clean reinstall. Start up for the day and speeds are slow, while other computers on network are still fast.

Does anything about this suggest wireless adapter failure? Flash Player problems? At one point on a player the flash crashed is the reason I ask. Is there a way to test these or other suspects?

I have a wand across the country which I'll bring back with me to test that way. Other ideas?

The PC which was apparently generating the IP address conflict has left the house.

Thanks for sharing any expertise on this!
My System SpecsSystem Spec
18 Feb 2012   #5

Win7 & Win8 64bit

Hi Greg,

What's your signed up bandwidth? Would you happen to know how many devices are all sharing in your network?
Also, anything that would hog the bandwidth is a big concern - HD video streaming, downloading and heavy gaming, all of these 'might' contribute to your issue.

Do you know if there's any QoS setup in your router? Who control's the router setting?
Can you modify if needed? What type of a Wi-Fi adapter to you have? B/G, N? Is the router also an N or just B/G? Is it a Dual Band and a regular router? These are some things that you might also look into and adusting the settings might help.

Sorry, too many questions that I asked. One of those might be causing an issue, if not we can blame the Wi-Fi adapter.

We'll await for your respond.
My System SpecsSystem Spec
19 Feb 2012   #6
Microsoft MVP


We have a Linksys 300N router here, which I have access into. I reset it a few days after the problem arose and nothing changed. Wired connection for all computers tests at 30 mbps, while wireless on all other computers holds around 20 mbps, except for mine now which is right now testing around 5 mbps.

This is an old HP 510 business laptop which refuses to die and runs Win7 fast, with Intel Pro Wireless 2200BG adapter which has held up fine until now. I wonder if there's a way I can test it other than taking it back to Calif on Thurs and trying our network there, then if necessary plug in a USB wand to take to MVP Summit and back to Florida.

I'm certainly open to all suggestions, and thanks.
My System SpecsSystem Spec
19 Feb 2012   #7

Win7 & Win8 64bit

You may do some tests, like changing the Mode of the Linksys router. If it's on Mixed Mode try N/G, G or B/G but inform others in your place about the tests that you will be conducting. I have an Intel Wi-Fi adapter similar to yours that died. The Samsung netbook that I'm using has Atheros B/G and it gets pretty decent signal and the wireless connection is fast too.

Other than that, it's hard to find out what others might be doing since you're all sharing the bandwidth.

Check the QoS also, see if it's enabled and what type setup it has. Try disabling it.

MVP Summit, I've heard of it?
My System SpecsSystem Spec
19 Feb 2012   #8

Windows 7 Pro 64bit build 7601 SP1

Does it do this whether connected physically or wireless?
Any new apps/programs that might come to mind?
Does it make any difference at various distances?
Have you tried using a usb wireless if you have one? Or borrow one?
Like others have said it could a whole bunch of things. Hardware failure, signal interference, too many pc's on same wifi channel.
My System SpecsSystem Spec
19 Feb 2012   #9

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2

My housemate has an iPod and every time she syncs the daggone thing it throws the entire wireless side of my network into an uproar. Conflicts, sluggishness, weeping and wailing and gnashing of digital teeth.

Be a shame if something happened to it...
My System SpecsSystem Spec
19 Feb 2012   #10

Windows XP 32bit

You can set a fixed IP address for your computer.
My System SpecsSystem Spec

 Can anyone explain this speed loss?

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