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There is a user interface to the router, usually accessed by going to your web browser and entering 192.168.1.1 or 192.168.0.1 on the address line. That will bring up a username/password XXXXX and the default is usually either admin and admin, or admin for one and blank for the other. Once in, you should be presented with a menu of screens, and one of them will define your security scheme and the encryption key. If you have a manual for your router, it should provide this information in detail. Or if you tell me the make and model of your router I should be able to find the manual online - but they all work about the same.
When I said "basic connection" to your laptop, I mean a wireless connection without security enabled - i.e., connecting without requiring a key at all.
It says on the bottom ver 6
Here is the link to get a copy of your User Guide:
Be sure to select Version 6 from the version menu at the top, and then click "User Guide" to download and view/print the user guide. You will want to take a look at Chapter 3 - the sections on Basic Wireless Settings and Wireless Security.
As you will see from the manual, you can access the router by using connecting any PC to the router with a network cable, and then entering 192.168.1.1 on the broswer address line. The username will be left blank, and the password XXXXX be admin (this assumes the password XXXXX not been changed, of course).. Using the User Guide as your guide, you should be able to navigate to the wireless settings and see what kind of security and what key has been established, and make changes if you desire.