There's not enough information to say for sure.

Go to a terminal and type:
sudo apt-get upgrade

That will give you more information.

On Thu, Apr 28, 2016 at 11:49 PM, <joe@actionline.com> wrote:

> Linux Mint system prompted me to update and when I tried
> to do so, I got the error message shown below. Tried it
> several times and still get the same problem result.
>
> So the system icon on the start line shows a red "X"
> indicating problems.
>
> What's up with this and how can I fix it?
>
>
> There is no public key available for the following key IDs:
> 1397BC53640DB551Failed 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.
>
>
>
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org
> To subscribe, unsubscribe, or to change your mail settings:
> http://lists.phxlinux.org/mailman/listinfo/plug-discuss
>



-- 
Todd Millecam