Hey guys,
im on mint 10 and when I run Update Manager i get this
Code:
W: GPG error: http://archive.canonical.com maverick Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.ubuntu.com maverick-security Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5

W: GPG error: http://ppa.launchpad.net karmic Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7889D725DA6DEEAA
W: GPG error: http://archive.ubuntu.com maverick Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: GPG error: http://packages.linuxmint.com julia Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3EE67F3D0FF405B2
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://archive.ubuntu.com maverick-updates Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991

W: GPG error: http://packages.medibuntu.org maverick Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2EBC26B60C5A2783
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release  

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/maverick-security/Release  

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/maverick-updates/Release  

W: Failed to fetch http://dl.google.com/linux/deb/dists/stable/Release  

W: Failed to fetch http://ppa.launchpad.net/gnome-colors-packagers/ppa/ubuntu/dists/maverick/main/source/Sources.gz  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/gnome-colors-packagers/ppa/ubuntu/dists/maverick/main/binary-amd64/Packages.gz  404  Not Found

W: Some index files failed to download, they have been ignored, or old ones used instead.
thats a lot of broken PPAs. Is there a way to auto fix them all?