newbie help with wireless connection needed

I loaded Ubuntu onto a fairly new laptop. In the process I deleted Windows. Ubuntu loaded just fine but I can't get my wireless connection. Its asking me for my proxy settings and I can't find them on any of my other pcs. My wireless router is linksys and I have tried to install the linksys drivers but I keep getting an error message saying the end of central directory signature not found.

Can somebody help or suggest where I can call for help?

What is the output from

What is the output from running the command, in a terminal: lspci

What does the line say about Network Adapter?