Linux Mint 17 updates fail ...

[joe at actionline.com]

Still can't get this to work correctly.

Problems with repositories
Cannot find how to change repositories
  http://www.upquick.com/temp/synaptic3.jpg
Cannot adjust synaptic top window size to see what is there.
  http://www.upquick.com/temp/synaptic1.jpg
Firefox crashes instantly and cannot even be opened.
  http://www.upquick.com/temp/ffcrash.jpg
Multiple attempts to reinstall firefox did not help.
  http://www.upquick.com/temp/synaptic2.jpg

Multiple error messages, including these:

Could not download all repository indexes

The repository may no longer be available or could not be contacted
because of network problems. If available an older version of the failed
index will be used. Otherwise the repository will be ignored. Check your
network connection and ensure the repository address in the preferences
is correct.

There is no public key available for the following key IDs:
1397BC53640DB551GPG error: http://dl.google.com stable Release: The
following signatures were invalid: BADSIG A040830F7FAC5991 Google, Inc.
Linux Package Signing Key <linux-packages-keymaster at google.com>GPG error:
http://ppa.launchpad.net precise Release: The following signatures were
invalid: BADSIG 8771ADB0816950D8 Launchpad HandBrake SnapshotsFailed 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)
Some index files failed to download. They have been ignored, or old ones
used instead.

========
Could not refresh the list of packages
ERROR###ERROR###ERROR###ERROR###ERROR###ERROR###ERROR
W:There is no public key available for the following key IDs:
1397BC53640DB551, W:GPG error: http://dl.google.com stable Release: The
following signatures were invalid: BADSIG A040830F7FAC5991 Google, Inc.
Linux Package Signing Key <linux-packages-keymaster at google.com>, W:GPG
error: http://ppa.launchpad.net precise Release: The following signatures
were invalid: BADSIG 8771ADB0816950D8 Launchpad HandBrake Snapshots,
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)
, E:Some index files failed to download. They have been ignored, or old
ones used instead.

-----------------------
On Oct 31, I previously wrote (in part)
> Linux Mint 17 updates fail on all of my boxes:
> W: Failed to fetch
> http://archive.ubuntu.com/ubuntu/pool/main/c/curl/libcurl3-gnutls_7.35.0-1ubuntu2.7_amd64.deb
> http://archive.ubuntu.com/ubuntu/pool/main/c/curl/libcurl3_7.35.0-1ubuntu2.7_amd64.deb
> http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd3_2.1.0-3ubuntu0.2_i386.deb
> http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd3_2.1.0-3ubuntu0.2_amd64.deb
> http://security.ubuntu.com/ubuntu/pool/main/o/openjdk-7/openjdk-7-jre_7u101-2.6.6-0ubuntu0.14.04.1_amd64.deb
> http://security.ubuntu.com/ubuntu/pool/main/o/openjdk-7/openjdk-7-jre-headless_7u101-2.6.6-0ubuntu0.14.04.1_amd64.deb
> http://security.ubuntu.com/ubuntu/pool/main/o/openssh/openssh-sftp-server_6.6p1-2ubuntu2.7_amd64.deb
> http://security.ubuntu.com/ubuntu/pool/main/o/openssh/openssh-server_6.6p1-2ubuntu2.7_amd64.deb
> http://security.ubuntu.com/ubuntu/pool/main/o/openssh/openssh-client_6.6p1-2ubuntu2.7_amd64.deb
> http://packages.linuxmint.com/pool/upstream/f/firefox/firefox_47.0+linuxmint1+rosa_amd64.deb
> http://packages.linuxmint.com/pool/upstream/f/firefox/firefox-locale-en_47.0+linuxmint1+rosa_amd64.deb