This I think is either really strange or normal.
I have windows 8 on my notebook and an Inter Centrino N-2230 wireless adapter.
Recently, all WIFI connections that appear as available have the 'connect automatically' option checked. I uncheck the box, but they automatically get checked again. I am sure that previously, all wifi connections had the box unchecked by
default.
However this is NOT the case with the one wifi connection I primarily use, ie my home cable connection. I can uncheck the option for this one and it stays unchecked. Bizarre.
I am a bit concerned that if I use my notebook near an unsecured connection, it will automatically connect to this without my knowing resulting in security concerns.
Any idea if this is an issue, and how to resolve it?
Thanks
Greetings,
Windows 8 by default automatically connects to the previously connected/known Wi-Fi network. Listed below are steps to disable the automatic connection to known Wi-Fi network.
Step 1: Right click on Wi-Fi icon and select Open Network and Sharing Center menu option.

Step 2: In the Network and Sharing Center window, click the Wi-Fi connection link.

Step 3: This should display the Wi-Fi Status windows as shown below.

Step 4: Now click the Wireless Properties button in W-Fi Status.

Step 5: Un mark the check box with label as Connect automatically when this network in rangeoption available under the Wireless Network Properties window. Click Ok button to confirm and the save the changes.
Source: http://blogmines.com/blog/2012/12/05/disable-auto-connection-to-wi-fi-network-on-windows-8/