Update failure

[slvfx]

Getting this error package when I try to update the packages.

W: Failed to fetch http://ppa.launchpad.net/sevenmachin...64/Packages.gz 404 Not Found

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

[ajgreeny]

Disable that ppa from your software sources and update again.

The web address for the ppa does not look correct, and it looks as if it is not available, or no longer needed, so either remove it or see if you can find a proper ppa address.