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Connecting to older wireless APs - this may help...
This is probably teaching people to suck eggs, but may help clear things up for some readers...
I was unable to connect to an older (backup) AP in Win10, but Win7 and my phone, tablet etc could connect no problem - these were connecting using WPA-TKIP, but MS now only allows WPA2-AES
So MS have removed the less secure WPA-TKIP protocol from W10 (this apparently started in W8), but they have left the even less secure WEP protocol in place!!!
I have now connected using WEP - on my router you can use a passphrase to create the hex pairs for the key, but you need to enter the actual hex characters as the key (eg 13 hex digit pairs = 26 characters to enter)
Looking at the wlan profile from the command line interface shows what the settings are...
netsh wlan>show profile plusnet2
Profile PlusNet2 on interface Wireless Network Connection 4:
====================================
Applied: All User Profile
Profile information
-------------------
Version : 1
Type : Wireless LAN
Name : PlusNet2
Control options :
Connection mode : Connect automatically
Network broadcast : Connect only if this network is broadcasting
AutoSwitch : Do not switch to other networks
MAC Randomization : Disabled
Connectivity settings
---------------------
Number of SSIDs : 1
SSID name : "PlusNet2"
Network type : Infrastructure
Radio type : [ Any Radio Type ]
Vendor extension : Not present
Security settings
-----------------
Authentication : Open
Cipher : WEP
Security key : Present
Key Index : 1
Looks like MS haven't completely removed WPA-TKIP: when the setting was set to WPA-TKIP the AP connected fine (the log on the Router shows that it has accepted the login passphrase credentials), but the state of the connection showed as State: Associating so it looks like W10 connects but does not complete the process
C:>netsh wlan show all
There is 1 interface on the system:
Name : Wireless Network Connection 4
Description : Qualcomm Atheros AR9485WB-EG Wireless Network Adapter
GUID : ee999a43-d489-495c-98ee-a673e36473e4
Physical address : 9c:b7:0d:1a:52:6e
State : associating
Radio status : Hardware On
Software On