Samsung Galaxy S3 requesting network security key when tethering
Go to setting &gt; more settings &gt; tethering now enable tethering. On same screen tap tethering again, not to turn off, so tap to the left of the tether on switch. A screen opens, go to bottom left corner and tap configure.  Scroll down you will see a password field, tap the show password then copy and paste the password to notepad or write it down. When your laptop asks for a security key enter password. I did this for the first time in ten minutes.