Windows 8.1 : connexion wifi impossible en WPA

En effet, elle ne peut le faire, mais elle semble néanmoins l'avoir fait d'après son site TechNet! Voir page ci-haut et les raisons évoquées.

Selon la même page, il y a une manière de contourner ce problème et voici donc un copié-collé des instructions par "milindsmart". Je ne les ai pas encore essayées.

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

0) Go to command line, preferably Administrator (not tried without).

1) C:\Windows\System32> cd \Users\ \Documents

2) C:\Users\ \Documents> netsh

3) netsh> wlan

4) netsh wlan> show profiles

5) delete profile name=
Enclose the name of network within quotes, this is to ensure that you can cleanly set up the right profile. Don't close the netsh, we'll need it some more. If you do, just reach there the same way as before.

6) 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

7) Try to create a profile, and try to get as many details to correspond with your requirement. The rest we'll edit in command line, so let's make it as easy as possible.

8) Do the same at the next screen. Edit Network settings > change all the parameters that you can, to match the requirement. My university tech support has a detailed document listing the options to choose, usually for windows 7, or even windows 8. get as many of them as possible.

9) Finish. Move back to your netsh terminal

10) netsh wlan> show profile
without quotes this time. This should show your previous attempt at creating a profile in the GUI dialog boxes. In my case, it had WPA2 and AES. It has to become WPA and TKIP. I also set my authMode to userOnly, since I hadn't done it right in the dialog box before.

11) netsh wlan> set profileparameter
displays a humongous list of parameters with detailed options, just carefully examine the syntax. It's all here.

12) netsh wlan> set profileparameter name= authentication=wpa encryption=tkip authMode=userOnly

13) netsh wlan> set profileparameter
Don't exit this yet.

14) 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.

15) It should connect. In my case atleast, it did. Verify by browsing.

16) netsh wlan> export profile name=
In order that you're not put through this ordeal again, export the profile safely to a file. Again, the profile name in quotes.

17) Wonder why microsoft makes things difficult for us!