About a month ago I accidentally added a wireless access point to my netbook for which I didn’t have the WPA2 access key (while I have long thin fingers these netbook keys are still cramped). Ever since adding that access point my netbook has attempted to connect to it instead of my own access point. Deleting unwanted access points is a relatively easy task.
First click the connections icon in the top right corner of the screen. Depending on whether you only have wireless or are using both wired and wireless the icon will either look like a sound wave pointing upwards or a couple of arrows, one up, one down. Click the wireless/wired connection and choose edit connections. When the dialog box appears choose the Wireless tab. From this tab you can delete or adjust various wireless access points you’ve connected to or tried to connect to in the past.