Question about Intel PRO/Wireless 3945ABG Network Connection (WM3945AGMW1WB)

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Vista Wireless Problem: Intel Pro/Wireless 3945ABG

Hi, I'm running Vista Home Premium and have Realtek RTL8101E Family PCI-E Fast Ethernet NIC (NDIS 6.0) and Intel PRO/Wireless 3945ABG Network Connection network adapters.  My wireless adaptor is running fine according to Device Manager but is not working properly according to Network and Sharing Centre.  I want to know how to fix the wireless adaptor please; here's the background to my problem.
I have a second laptop that recognises the several wireless networks in my range.  My problematic one, however, doesn't find any.  I've rolled back/updated the driver, uninstalled it, reset the hardware configuration, reset the router and the wireless network adaptor: no joy.  When I diagnose why Windows Vista cannot find any wireless netorks I get the three usual responses: reset the adaptor, driver or hardware related issues, check TCP/IP settings.  All done.  Interestingly, it states that "the wireless network adapter on this computer is not working properly", contradicting the Device Manager.
Can anyone tell me how to remedy the problem please?  I can't get online unless I sit by my router and plug the laptop in to it with an ethernet cable! Thanks. Pete.

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  • p_j_0810 Dec 30, 2008

    Hi Chris, thanks for the reply.  Nope, not foolish, all good suggestions.  The wireless light is on, and i've double checked it is turned on.  I can't select/deselect "Never Dial A Connection" although it is selected as default.  

    Interestingly, and I think it is related, I got a bluescreen error the other day just after posting up my question - clicky.  It's the first I've had since reinstalling vista a few months back but if I get another one i'll probably reinstall vista again to try and reset everything as was.  This is the error panel that opened when I restarted Vista. It points towards the bluescreen error being because of the Realtek ethernet card rather than the wireless.  I don't like the Realtek, i've had problems with it before that have been driver related.  Any thoughts on this?




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Hi Pete,

You sound like you know what you're doing, so forgive me if these suggestions seem foolish or patronising..
Does your laptop have a wireless button?
Vista Wireless Problem: Intel Pro/Wireless 3945ABG - 8f45b35.jpg

When you go to Internet Options and click the Connections tab, have you checked 'Never Dial a Connection'? This is essential..
I have exactly the same ethernet card and network adaptor, but haven't had any problems, and we have 2 laptops and 2 pc's here all detecting our router okay so..
It's definitely not MAC filtering on the router, as you would still see the network in your list..
I can only suggest uninstalling the Intel Pro Wireless driver and downloading a fresh one from here.
That'll reset default settings at least..
Hope this helps
Let me know how you get on.. If I face this problem I want to know how to fix it too!

Chris (ziraffa)

Posted on Dec 27, 2008

  • chris grams
    chris grams Dec 30, 2008

    Hello again Pete,

    Hope you had a nice Christmas..
    I have one suggestion which you'll either see as a total hassle or good fun.. if you download an .iso for the new Ubuntu linux distro, or Fedora, and burn it onto a disk, you wouldn't need to install it, you could just run a LiveCD 'session' and see if the home wireless network appears in the list when you click on the network icon in the top right hand corner of the screen. Mine did when I ran both, so support for the adaptor is automatically downloaded and installed.
    If any networks appear at all, that would at least tell you that it is a problem with Vista, or the Vista wireless driver that's installed, or Data Execution Prevention should be turned off for some application or other to prevent Vista's 'supernanny' protection kicking in, or something on that side of things. I mean, at least it would narrow the options down..
    I think a clean install is a good idea, but you could try the linux 'test' first, just so you have gotten some idea of what the problem might be..
    As for the Realtek ethernet card mystery, I've only ever actually used a cable once, to login to my router and restore factory settings because my Mom enabled WPA and god knows what else, and forgot the password ;0
    so I can't offer much feedback on that, but a bluescreen is definitely not a good thing..
    So, maybe try the linux disk thing and see if you can get wireless, before you format, then you'll know a bit more..
    If I don't hear from you before, have a fine New Year!

    Chris (ziraffa)

  • chris grams
    chris grams Dec 30, 2008

    Oh, when you have a Linux LiveCD loading up the session make sure you're not plugged into the ethernet, so that it just autodetects the wifi..
    And maybe post your laptop brand/model number etc (you can use Belarc Advisor to be sure) and I'll search for a chipset driver and a wireless LAN driver for your motherboard, just in case we're missing something..
    Chris (ziraffa)



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