Steam won't run

[names_are_useless]

I hope this is the right forum category. If not, please move.

Steam (Linux version) has been working fine for me since I installed it months ago. Unfortunately, I opened it this morning and the automatic update started. Before it finished, my laptop froze up ... nothing unfroze it. I decided to do a hard restart, and once it did and I tried opening Steam again, I received a popup message:

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Error: You are missing the following 32-bit libraries, and Steam may not run:
libc.so.6

I have tried removing it from the Software Manager and installing it again: same error

I have tried purging and reinstalling steam from terminal:

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sudo apt-get purge steam
sudo apt-get install steam

and still same error.

I have tried reinstalling libc files:

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sudo apt-get install '^libc6.*'

and I get a whole bunch of packages of

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... is already the newest version.

and it ends with

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E: Unable to correct problems, you have held broken packages.

I've tried installing the latest i386 for libc6:

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sudo apt-get install libc6-i386

but I'm told its already the newest version.

I'm running Linux Mint 17.3 Mint Rosa. Anyone have a solution?

[names_are_useless]

I am able to get to my GUI Desktop again, so I've reverted the thread back to the Steam issue.