My mom gave me this computer as a graduation gift for my daughter. I have no user manual and have no idea how to set up wireless internet. I have an AT&T gateway in my house and was set up for wireless as the other laptop we have was wireless as well. I have the switch on the front left set to wifi but it will not find any connections at all. Also, what is the large port on the left side for? I am pretty computer knowledgeable but can't figure this out. Thanks.