wlan something is your wireless lan. I am assuming you have a usb wireless dongle or card/wifi to connect to the internet? You will have to dl the latest drivers for your wireless card/antenna.usb. You'll obviously have to use another pc to get the latest win7 drivers.
When I do a fresh install I always have the drivers for the Ethernet/wireless BEFORE I install, saved to my thumb drive. Then I download everything else. I hardly ever install drivers from discs anymore. Esp for 7.