1.Right click on the network/wireless icon in lower right of your screen, then choose "Start Network and Sharing Center."
2.In the Tasks pane on the left side, click Manage wireless networks.
3.Right-click the connection you want to delete, and then click Remove network.
4.In the Manage Wireless Networks - Warning dialog box, click OK.
Then reconnect to your personal wifi network.
Is Comcast your provider? If so, you're basically using the 'public' connection that Comcast is installing everywhere.
i recognize that i'm answering a question that was asked 3 years ago... but i went looking for an answer to a similar (if not the same) question and this is the 1st result that i found.
anyways, i am fairly intuitive with windows... and the answer was not apparent to me. note, i am using windows 7 but this might be applicable to windows 10.
i kept creating wireless profiles using windows "manage wireless networks" and 'something' was overriding it. that something is intel proset wireless wifi connection utility... which i am going to call IPWWCU. you'll know that the IPWWCU utility is installed because when your wireless connection changes it will pop-up in the bottom-right corner of your screen for a couple of seconds. to manage wireless networks from the IPWWCU utility, click the up-arrow in your system tray (in the bottom-right corner of your screen) and double-click on the green wifi icon.
to change the order of the wifi priorities (e.g. allow your computer to connect to xfinitywifi but only if it is the only wifi available)... select profiles, select xfinitywifi, then select the down-arrow until it's at the bottom of the list.
or to prevent your computer from connecting to xfinitywifi... select xfinitywifi, properties, manage exclusions, add, enter xfinitywifi it is not entered already, select add.