My girlfriend's laptop is a brand new Lenovo Ideapad S400 Touch. I saw the free upgrade to 8.1 and thought it would be a good idea to do. But upon reboot it is no longer able to connect to the wireless network.
It has the broadcom wireless card in it. I went into the device driver settings and made sure that the settings under advanced "should" give the laptop access to the network.
Prior to upgrading from Windows 8 I was able to connect to the wireless network.
I tried downloading and installing the latest Windows 8 wireless drivers for the system. But that had no effect. I have been trying various settings and rebooting. No luck.
Now just to be clear, when I go to connect from that laptop I can see and click on the the name of the wireless network and try to connect. I am just unable to. I verified and re-verified the password for the network multiple times.
I am not sure what could be causing this at this point. Any ideas or suggestions are welcome.
Thanks,
Patrick
Best Answer
First just try changing the settings manually from the command prompt:
netsh wlan set profileparameter name=nameofnetworkprofile authentication=WPA2PSK encryption=tkip
Otherwise, you will have remove the profile and recreate it:
Go to command line, preferably Administrator (have not tried without).
C:\Windows\System32> cd \Users\<User>\Documents
C:\Users\<User>\Documents> netsh
netsh> wlan
netsh wlan> show profiles
delete profile name="<yournetwork>"
Right click the connection icon in lower right corner > open Network and Sharing Center > Set up a new connection or network > Manually connect to a wireless network
Try to create a profile, and try to get as many details to correspond with your requirement. The rest we will edit on the command line, so let's make it as easy as possible.
Do the same at the next screen. Edit Network settings > change all the parameters that you can, to match your environment.
Finish. Move back to your netsh terminal
netsh wlan> show profile <profilename>
netsh wlan> set profileparameter
netsh wlan> set profileparameter name=<profilename> authentication=wpa encryption=tkip authMode=userOnly
netsh wlan> set profileparameter
Now click the connection icon, and connect to the network. It will ask you the username and password in a different style, that was my clue something was different this time.
It should connect. In my case, at least, it did. Verify by browsing.
netsh wlan> export profile name="<profile name>"
ref: http://en.community.dell.com/support-forums/network-internet-wireless/f/3324/t/19528910.aspx
ref: http://www.tomshardware.co.uk/answers/id-1849258/aes-tkip.html
ref: https://social.technet.microsoft.com/Forums/en-US/290c63b4-ce04-4483-a047-e1000c7d7699/wpa-security-types-are-missing-after-upgrading-to-windows-81?forum=w8itpronetworking