Use your Internet browser to access the Cisco Software Center at the following URL:
http://www.cisco.com/public/sw-center/sw-wireless.shtml
Locate the access point firmware and utilities section and click on the link for the 1100 or 1200 series access point.
Double-click the latest firmware image file, such as c1100-k9w7-tar.122-11.JA.tar for 1100 series access points or c1200-k9w7-tar.122-11.JA.tar for 1200 series access points.
Download the access point image file to a directory on your PC hard drive.