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w70n51.sys blue screen while using wireless connection

Submitted by on Thursday, 12 July 200736 Comments

Okay guys, I found me a good one. The file mentioned in the title, w70n51.sys is driver for an Intel wireless card. The card can be found on many makes and models of laptops. So far I’ve confirmed two Dells and one Sony to be affected by this problem. The symptom is that when you get online using your wireless card, blue screens occur. I looked through all three computer’s dump files and found that w70n51.sys is a nasty little bugger and has been causing problems for a lot of people. My only solution would be to update the driver if you can find one. Otherwise I’m still researching it and once I figure something out I will definitely let you all know.

36 Responses to “w70n51.sys blue screen while using wireless connection”

  1. tonypal says:

    I had the same problem and went to the sony website and just downloaded an wireless driver update. It worked wonderfully- thanks for the help

  2. Martins says:

    Help please. I notice this problem just last week on my laptop Compaq presario B2000). Is there nybody out there that knows a way out of this bug?

  3. Robert Genis says:

    After extensive troubleshooting, I acquired a copy of ERD Commander and was able to ascertain the source w70n51.sys file. ERD had updated the driver for me, however, ERD repaired most of it but I also found that it could not repair the driver for the cpu (intelppm.sys) This was the original error I had found. After copying over the original source file from the i386 file, I ended up restoring a saved version.

    …. so far so good.

  4. Hugo Vanden says:

    I had the same problem with a Vaio PCG v505DXP. I downloaded the driver from Sony and it seems to work.
    I followed Tonypal advice…
    Thanks

  5. marco says:

    Hi Hugo, which update did u download. Please provide link. Thhanks

  6. bill says:

    just had a customer who’s ibm thinkpad connected fine at my shop, connected fine at hotels and other places but blue screens in his house as soon as it connects with his router. Minidump yields w70n51.sys. Updated the drivers but it is hit and miss since I can’t make it crash in the shop.
    Ever seen that?

  7. james fogacci says:

    Had same blue screen problem on two laptops a Fujitsu C Series Lifebook(Intel(R)Pro Wireless 2200BG Network connection) and a Toshiba Satellite Pro(Intel Pro Wireless Lan 2100 3B Mini PCI Adapter Software (w70n51.sys)). I went to Intel download site and updated software. Just did this yesterday and hope that it works because Intel said they will discontinue these updates Dec 2009.

  8. jerry says:

    is there any way to fix i tried updating the file and i cannot stay on line with dell inspiron 8600 to long and i try to down load it it says page no longer available jerry

  9. Alexander says:

    I just had this blue screen specifying IRQ levels as the issue, in my case I debugged the bump file and it was mcagent, a mcafee service, causing the w70n51.sys driver to fault.

    Removing mcafee then updating the driver solved my problem.

  10. Mark says:

    re Bill from July 30 2009 — I had the same issue with my X40 Thinkpad.

    I would get the blue screen in some places and not others. I was running problem-free for six months in one apartment and moved elsewhere and began getting the blue screen six times a day.

    I downloaded wireless driver v. 1.2.4.41 for Intel PRO/Wireless LAN 2100 3B Mini PCI Adapter via Lenovo Web site and so far so good …

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