Windows 8.1: WiFi dropping and/or "Limited"

I downgraded to the MS driver 15.10.0.12, and then followed these tips from the 69-page forum topic at

https://communities.intel.com/message/175989:

1.  "In device manager, under the advanced tab of the Centrino card, look for a setting called Bluetooth(R) AMP, and turn this

to disabled."

2.  "Setting the router and adapter to match supporting features was key. Enabling WMM, 802.11 n,g,b only (no a), and using the

20 MHz channel width was effective."  I kept WMM disabled.

I also disabled Bluetooth and marked all the Bluetooth services as "Disabled" or ensured they were shut down:

1.  Bluetooth Device Monitor
2.  Bluetooth OBEX Service
3.  Bluetooth Support Service
4.  "Intel(R) Wireless Bluetooth(R) 4.0 Radio Management"
5.  Under "Intel(R) Centrino(R) Advanced-N 6235 Properties", I turned off "Allow the computer to turn off this device to save power."

That has kept my WiFi stable since last night.

After installing some Windows updates, though, the driver was again upgraded to the latest driver from Intel, 15.10.3.2, that

you get via "Update Driver Software...".  I had to ensure I rolled back to the Microsoft-authored driver, 15.10.0.12, to make it

stable again.

I have managed to solve the wi-fi problem with my computer though I took a more drastic step.  I downgraded to Windows 7.

The above 5 steps still did not fully solve the problem, so I disabled "802.1n Mode".

That has kept my WiFi stable for a whole day.

It means I am down to 54Mbps, but since my Internet connection is 25Mbps, 802.11g is not the bottleneck for me.

Since installing 8.1 Pro, I'm having issues with WiFi dropping internet connectivity and always showing "Limited" when clicking on the system tray icon.  When I troubleshoot the problem using the system tool it is always the gateway that is faulty.  I have uninstalled/reinstalled the device drivers several times, installed the newest drivers directly from Intel, restarted the computer, etc.  I can restore connectivity by turning WiFi off then back on, but the connection will drop at what seems to be random intervals.  My applicable system specs are as follows;

Lenovo Y510P  Laptop

Windows 8.1 Pro

Intel Centrino Wireless-N 2230

Apple Time Capsule router w/newest firmware

Needless to say this is quite an irritating bug that didn't exist prior to the update to 8.1  I hope this can be resolved quickly. Thanks!

Please create an Intel communities account and post a message in this thread, it is over 60 pages long of the same issues and Intel still has not fixed the issues and it has been over 1 year.

https://communities.intel.com/message/213179#213179

It will take some work to make a login at Intel since they made it near impossible to create an account. However it can be done.

The more people that post messages in that thread the more noise we make at Intel, the faster a resolution will be released. Although it has been over 1 year and I believe it is a hardware issue possibly due to the SOC not being able to keepup with the bandwidth streaming into the card.

Also try emailing Eric Miguel, ICS Manager at ******@intel.com to contact someone directly at Intel.

Neowin also posted an article regarding the issue.

http://www.neowin.net/news/intels-wi-fi-adapters-connectivity-issues-continue

Let it also be noted a large chunk of users with Intel Centrino Advanced-N 6235 hardware will not notice any issues unless downloading large files or streaming long high def movies, of those many are not technical enough to distinguish between a hardware/driver error or a wifi router failure and will blame the router on poor service. So many of the issues go unreported.

It's obviously a big issue and Intel and the OEM vendors putting the 6235 into their products are twiddling their thumbs ignoring the issue until hardware warranties run out.