W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release  Unable to find expected entry 'main/binary-i386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://ppa.launchpad.net/n-muench/calibre/ubuntu/dists/wily/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/n-muench/calibre/ubuntu/dists/wily/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.