升级win8.1后wifi不能使用

今天心血来潮把家里的两台笔记本都升级到了win8.1。
升级很方便,在app store里边点upgrade,等着下载完成后自动安装,再重启后做一下简单的设置就可以了。但是有一台Dell N4020升级后wifi就怎么也连不上了,显示连接受限。不知道发布之前是怎么测的。前两周听说Ivan的笔记本升级也出现问题了,直接挂掉,不得不重装。看来win8.1升级的问题不少。

share一下解决方案吧, copy from http://superuser.com/questions/665402/windows-8-1-killed-notebooks-wifi

After further research i discovered a fix that worked for my particular device.

I followed these steps:

Open Device Manager (search Windows Help if you don’t know what this is)

Select ‘Network adaptors’ and then open (double-click) Broadcom 802.11n Network Adaptor

Go to the Driver tab and click the Update Driver… button

Select ‘Browse my computer for driver software’

Select ‘Let me pick from a list of device drivers on my computer’

Select the “Broadcom 802.11n Network Adapter (Broadcom)” entry from the list, and click

I used the Broadcom 802.11n Adapter version 5. Next restart and test.

Note: You must disable compatible hardware checkbox to find the previous versions of the driver

This solution uses the driver that was working before installing windows 8.1

UPDATE: After further testing i discovered that the broadcom 802.11n network adapter was actually limiting my connection speed. I am now using broadcom multiband network adapter with full speed

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