I'm a total noob. I updated Skype from the latest version available on the Skype website. Now I get the following error every time I try to run software updater:
W:Failed to fetch http://archive.canonical.com/commercial-ppa-uploaders/skype/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found [IP: 18.104.22.168 80], E:Some index files failed to download. They have been ignored, or old ones used instead.
I need idiot-proof noob-friendly instructions on how to fix this.