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Sporadic but recurring connection dropouts on an Intel 6235 wireless adapter


Dear all,

I have the same issues of intermittent sudden connection dropouts as reported by others with the Intel Centrino Advanced-N 6235 Wifi adapter and the Intel Proset 15.x drivers!

My system is a brandnew desktop computer with an Intel i7 3770 Quad-Core CPU, an Intel Z77 chipset, an Asrock Z77E-ITX mainboard, 16 GB of RAM, and Windows 7 64-bit.

Previously, I already encountered the issue with this adapter's predecessor, the Intel Centrino 6230 and only managed to resolve it by going back to an older driver version. If my memory is correct, the Intel Proset 14.x version range worked flawlessly, but the 15.x drivers lead to the dropouts (I always use 64-bit drivers).

These can occur randomly after 5 or after 50 minutes. The adapter suddenly disconnects and won't reconnect to the wireless network unless it is reset. The wireless router itself is fine as there are over a dozen devices from all types of brands that connect regularly to it without any problem at all.

The fact that the problem occurs on two different cards (6230 and 6235) leads me to believe that there is a driver problem.

On the 6235, going back to a 14.x driver does not seem to be an option on the table, because the device seems to be only supported by 15.x versions. I already tried going back from the recent 15.2 version to the previous 15.1.1 (after uninstalling through the device manager), but the problem still persists. Now I just went back to 15.1.0 and it's been ok so far, but i'm not very optimistic.

I have tried different changes in the driver settings but with no success. The problem persists!

I'd be thankful for a solution.

Best regards,


Edited 9/5/2014 by John S. (Intel Customer Support).

The "/message/169514# 169514 Sporadic but recurring connection dropouts on an Intel 6235 wireless adapter" thread will be locked. This thread will remain on the forum for you to reference, but no new posts will be possible on this thread.

The 17.1.0 version of Intel® PROSet/Wireless Software and Drivers has fixes for connectivity related issues with the Intel® Centrino® Advanced-N 6235 wireless adapter. If you are still experiencing connectivity issues after installing the very latest software and drivers and you require further troubleshooting, please contact Intel Customer Support. If you prefer to ask questions, make comments, and/or receive answers on this support forum (Wireless Networking Support Community), please start a new thread or find an existing thread that matches your specific issue with your specific hardware/software.



http://www.intel.com/p/en_US/support Intel Customer Support

1,128 Replies

I insist,

For me, on Windows 8.1, after upgrade, all went to hell.

Then, after a manual driver downgrade, all is working without drops, Wireless and Bluetooth Mouse.

Dell XPS L502x

Intel Centrino Advanced-N 6230

Wi-Fi Driver:, 03-06-2012

Bluetooth Driver:, 04-07-2012

Both Drivers provided on Dell Website (Official for Windows 8 on this model).

I strongly suggest to you to download and try by yourself. You can extract the .EXE and Run Setup or install manually on the Device Manager.



I have two clients (in separate physical locations) with Lenovo Helix units running Windows 8 that have the 6235 Chipset.

Both Helix Units display the symptoms described in this post. I've updated the drivers and that has reduced the frequency of the issues, but the issues still occur.


The Bluetooth and WiDi are totally unreliable.

Dropped Bluetooth Connections after an unpredictable amount of time... turning off ALL RADIOS (airplane mode) and turning them back on fixes this without a restart. Totally unacceptable.WiDi refuses to find any adapters when the Helix is revived from sleep ... reboot fixes this issue...Bluetooth doesn't always work after sleeping... without a restart.The BIOS updates and Intel driver updates in the last three months have helped, but the problems are not completely resolved.Having your bluetooth presentation remote (or cell phone) connection fail in the middle of a presentation to clients makes customers wary of using this device for day to day operations.


If you have bleeding edge / debug drivers to test, please let me know -- I want to resolve this issue for my customers.




New Contributor I


Eric (lastname) ICS Manager at Intel has personally pledged to help everyone out regarding the Centrino 6235 issue.

From: (Eric's e-mail address)

To: XXXxxxx@xxxxxxxxx

Subject: Intel Service Ticket # (Service ticket number)

Date: Thu, 7 Nov 2013 18:16:00 +0000


Regarding your service ticket number (Service Ticket number).

We are continuing to investigate the connectivity issues. There is a release due out in 2 weeks that has some additional fixes for Windows 8. Intel is committed to continue investigating and fixing connectivity issues on our wireless adapters. We expect to have additional software releases as fixes are completed and verified.

Regarding you individual situation, if you are willing, we would like to work with you in gathering more information on your system, which may involve installing a software tool that gathers information while the issue is occurring. This could give us insight into what is happening on your system. This tool, however, is not expected to fix any issues. Please let us know.



Eric (lastname)

Intel Customer Support (ICS) Manager

Intel Corporation

(Eric's e-mail address)


New Contributor I

So Intel has the time to go in and erase Eric's last name and email address ^^^^^ up there but doesn't have the time to update all the Centrino 6235 users of a time for a resolution? Well played Intel, well played.

Well it has been over 1 year so obviously they must want more time to screw around with us.


New Windows 8.1 drivers are out - 2 days without a disconnect although I still don't hold out much hope!

New Contributor I

Any more updates Byron? I have attempted to install the drivers several times and always error out on Win8.1, even after uninstalling and wiping everything out of the registry.

Also as always no communication from Intel about the new release!

New Contributor I

Here is another update after 2 weeks and no word from Eric so I contacted him again:


I'll have to find out from our Engineering group, and I'll get back to you.


Eric (lastname)

Intel Customer Support (ICS) Manager

Intel Corporation

New Contributor I

Over at Microsoft Compatibility Center, the card score is losing by a lot 42 not compatibles versus 0 compatible! Great job Intel!

https://www.microsoft.com/en-us/windows/compatibility/CompatCenter/ProductDetailsViewer?Name=Intel+Centrino+Advanced-N+6235+Wireless+Network+Adapter&vendor=Intel&Type=Hardware&tempOsid=Windows+8.1 Windows 8.1 compatibility for Intel Centrino Advanced-N 6235 Wireless Network Adapter model

Community rating


0 of 42 people voted compatible

New Contributor I
New Job posting at Intel! Maybe the new hire will be able to fix the issues with the Centrino WiFi platform and the Centrino 6235 Advanced-N (maybe put the N back into advanced?)???

Wi-Fi Core System Architect/Engineer. Job

Date: Oct 9, 2013

Location: Israel

Wi-Fi Core System Architect/Engineer. - 627060






Description of group / project



The Wi-Fi Core System Architecture team leads the development of high performance W-Fi (802.11) communications systems, their integration into Intel platforms, and their coexistence with other wireless sub-systems. The team is responsible for the definition of full Wi-Fi end-to-end solution while working closely with platform architects and system engineers, silicon, HW and SW design teams, customers and marketing. The team defines and escorts system requirements both for silicon, SW and HW, focusing on MAC (Media Access Control) layer, platform interface and coexistence.



The team is part of MCG (Mobile and Communications Group), which is responsible for developing IA-based (Intel Architecture) platforms for mobile devices, including (but not limited) notebooks, Ultrabooks, tablets and smartphones.



Job Description (What to do specific):



Design and support the development of highly integrated mobile platforms



Work with multiple teams: platform and communication architects, silicon/SW/HW design, validation, marketing, project engineering and management, to develop, to review and to clarify with stake holders the product requirements.



Provide system support during the development and integration stages, as well as during sustaining in post-release period.





- Over 6 years of experience in engineering, over 2 years as system engineer/architect. Multiple disciplines- advantage. Wireless communication systems-advantage.


- Experience with system aspects and design considerations of low power mobile platforms.


- Experience with system integration. Specific experience with integration of Communication Systems - advantage.


- Experience with Wi-Fi systems - advantage.


- Independent and self-motivated, capable of executing under uncertainty, in a dynamic environment.


- Excellent interpersonal relations and team-work skills (backed-up by recommendations).


- Leadership and ability to drive forward activities in matrix reporting.


- Excellent verbal and written skills in English.



Job Category: Engineering


Primary Location: Israel--


Other Locations: Israel-Haifa


Full/Part Time: Full Time


Job Type: Experienced


Regular/Temporary: Regular


Posting Date: Sep 22, 2013



Apply Before


: Sep 22, 2014



Business Group Employees in the Intel Architecture Group (IAG) deliver innovative platforms across computing and communication segments including data centers, mobile and desktop personal computers, handhelds, embedded devices and consumer electronics. Intel's industry leading technology is used to create integrated hardware and software solutions such as processors, chipsets, communication radios, graphics processors, motherboards, and networking components that deliver capabilities from security and manageability to computing performance and energy efficiency. IAG employees are at the forefront of enabling a new era of computing that is more integrated into all aspects of our daily lives.


The Wi-Fi Core System Architecture team leads the development of wireless communications systems in accordance with 802.11 wireless communication standards. The team is part of the organization MCG (Mobile and Communications Group) which is responsible for developing IA-based hardware (Intel Architecture) software and systemwide capabilities for mobile devices as part of the Intel Architecture Group. The team is responsible for the definition of full Wi-Fi end-to-end solution while works closely with Marketing, HW and SW teams. The team defines and escorts system requirements both for SW and HW, focusing on MAC (Media Access Control) layer.


Job Segments: Architecture, Electronics Engineer, Engineer, Network, Embedded, Engineering, Technology

Hello Everyone..... I also had this dropping wifi issue, but i think i might have fixed it.

For those who have Windows 8.1 try the Wireless driver version from 8/22-2013.

I hope it works, cheers.


I don't have the same wireless adapter, so this may not apply, but having an Intel AC 7260 wireless adapter installed in my Dell XPS 12, I was also experiencing frequent network drops, every hour to a couple of hours ever since installing Windows 8.1. Like you, I tried just about everything that was listed here as possible solutions, including installing different drivers, but nothing I tried worked. Invariably, I would get a "No Internet connection" message and I would have to restart the adapter to get it going again.

After weeks of dealing with this issue, I finally broke down and decided to replace my old 2.4 GHz band wireless N router with a new dual band AC router just to see if anything would change, and amazingly, I have not experienced a single network drop since! The increased network speeds I'm getting now is certainly nice, but it does not compare to the relief I now have knowing that I now have a solid, reliable connection without having to worry about it randomly going down at any time!

Now I'm certainly not suggesting that everyone should rush out and buy a new router, and am convinced it's still a huge problem that Intel needs to fix as soon as possible, but if you are tired of dealing with this issue on a constant basis, it may well be worth your time to investigate this as another option to try. Good luck!


I just bought a NUC 54250WYK and the Intel Centrino 6235 Advanced-N and after installing Windows 7 x64 and the drivers from Intel's webpage it didnt take me many minutes before internet stopped working. It even made windows hang when i wanted to disable/enable the card. So i went to google only to find out this wonderful forum. Its amazing after this long and so many profe Intel hasnt done anything about this deal breaking problem.

I tried the tips and disabled the "802.11n mode" from the Advanced menu for the card and the network seems more stable, no hang after almost one hours so that seems to be the only thing that works this far,

I use the latest drivers from Intels page:

If you have Windows 7 64-Bit:


DRIVERS ONLY: Wireless_16.6.0_Ds64.exe

https://downloadcenter.intel.com/Detail_Desc.aspx?ProductID=3502&DwnldID=23391&lang=eng&iid=dc_rss https://downloadcenter.intel.com/Detail_Desc.aspx?ProductID=3502&DwnldID=23391&lang=eng&iid=dc_rss

I wish i knew this earlier and could get another card :/

Anyone can recommend something else that works without this much hassle?


Yep, I've actually reported on this resolution for the 7260 card, and likely the others.

Though, I don't think it matters what router is used, simply a working one. I set up a 2 year old router as an access point, hooking it up to the problem router. Anyway, folks can see my thread here on it.



I've upgraded to Windows 8.1 and now i can't roll back to microsoft driver.

Please please tell me any workaround!

My internet doesn't work with any intel centrino advanced n6235 driver.

This is the question of life, i have the only laptop and i'm working on it. I can't do it without internet.

My current driver is from 23sep13.


I also bought Intel Centrino 6205 for my father and its funny how the same exact drivers are rock solid with that chipset!!! This tells me the problem is hardware rather then software, i actually went ahead and ordered the same (6205) now, shame i did not find any alternative to Intel or i would not pay for Intel thanks to this bad support. So if you can effort the small cost i would for sure buy the 6205 model, it dont have Bluetooth but i wasnt going to use that allot anyway so for me its not a big deal.


I am having this problem as well since upgrading to Windows 8.1 and now i can't roll back to microsoft driver.

I tried to manually install the driver from windows 8 into windows 8.1, but is unable to do so due to unsigned driver.

Why is it the Microsoft driver is able to work in windows 8 but the Intel driver keeps dropping connection?

I hope Intel is aware and doing something about this problem.

New Contributor I

Figured I'd share that Intel will reimburse everyone that is suffering from Centrino Wifi Card issues, should it seriously have taken a whole year?

Hello Mr. xxxxxxx:

Our engineers have been working hard on fixing many issues related to the Intel Wireless Network Card. Although we were able to fix many customers' issues, we find that other issues are more challenging to root cause because of the complexity of other customers' system configurations. In such cases we recommend that these customers refer to the system manufacturer or place of purchase as they are more familiar with their system configurations and of any potential compatibility issues.

We've been communicating the issue once we've discovered it either on the Intel Communities or through Tech Notes on the Intel Support site. In Addition, we have regularly posted updates on Download Center for Wireless Networking – http://support.intel.com/support/wireless/wtech/proset-ws/sb/CS-034041.htm http://support.intel.com/support/wireless/wtech/proset-ws/sb/CS-034041.htm.

Thank you for providing additional information about the issue you are experiencing and we look forward to receiving logs from both Wireshark and our Wireless Reporting tool. Hopefully, this information can lead our engineers down the right direction in looking for a solution to your issue.

We will gladly refund your Intel product. Please refer to the manufacture for warranty requests for non-Intel products. If you wish to head down the "refund" path and or require additional technical assistance please feel free to contact Intel Customer Support at 916-377-7000 and reference your Intel Service Ticket # (service-ticket-number). Of course, you may also contact me and I'll help as best I can; but contacting Intel Customer Support would be the quickest way to obtain support as there are a multitude of people at our call center that can assist. As the holidays are approaching it may be a challenge for me to find engineers available immediately to assist us with your situation.



Intel Customer Support (ICS) Manager

Intel Corporation

Eric's e-mail address



Christ sake, can't even be at Facebook, Youtube, whatever with latest drivers.

Although Microsoft drivers for Windows 8 kind of work alright..

I'm tired of this.

New Contributor I

Intel still waiting for you guys to pull your heads out of your trashcans and fix this issue like a real company would. No updates from you guys since how long?

http://www.broadcom.com/products/Wireless-LAN/802.11-Wireless-LAN-Solutions/BCM43241 2x2 MIMO Dual-Band Combo Device Supporting 802.11n, Bluetooth 4.0 + HS & FM Receiver for Tablet Computers - BCM43241 | Broadcom


Here is my sad story about how frustrated I am that I bought a brand new asus laptop and I can't play or use internet with consistency.

I post here to try and grow the number of complaints, as some nights I just want to smash my computer to the ground. This could be a great idea as I would be able to buy a new one being extra careful there is no INTEL hardware in it...

But I don't have the few hundreds euros in front of me.

Having a laptop, I can't replace the wireless card, so I guess I am fucked, cause INTEL is not gonna pay for a new laptop without their faulty hardware, Microsoft won't take any comment on how their 8.1 make so many people losing their mind in front of their pc with those issues, and ASUS will laugh at me saying that it is INTEL fault.

I don't know if you guys know this fun saying: "It is not video games that make people violent, it is lag" here I can relate as not being able to access internet because of a constructor who wont even reply properly to complaints makes me willing to smash my computer on the ground.

That was my 2cents


I've had the same issue with my Samsung series5.

Here is the solution that works for my PING SPIKES:

1) Uninstall wifi card drivers (I strongly suggest that you should download drivers ,before uninstalling current ones, from intel website just in case that something goes wrong)

2) Let windows install default drivers. (for me it was:

3) Disable intel bluetooth devices in hardware manager.

4) Open wifi card settings in hardware manager.

5) Click on advanced

5) Disable 800.11n

6) Disable Wake on pattern

7) Disable that Magic option (I have Polish version of windows so I'm not quite sure how it is called in English. I could translate it to something like this: Resuming based on Magic bundle.)

Worked for my ping spikes. I hope it will help someone.

(PS> My internet speed is 10mbps so i don't know how this would affect users with higher network speed connection)