When I start thunderbird the mozilla message loads

What does this mean? Please explain in more detail.

then everything stops.

What stops? Please explain in more detail.

The error console info suggests corruption to me.

Please provide the exact error message.

I think I should uninstall, then install Thunderbird

Why? If the problem is something in your profile you're wasting your time.

I cannot find any info on how not to lose my profile with an uninstall-install.

You wouldn't. Thunderbird stores the profile with your data separate from the program files. In any case, Google is your friend.

When I start thunderbird the mozilla message loads

Welcome to Thunderbird

Why we need donations

You might already know that Thunderbird improvements are no longer paid for by Mozilla. Fortunately there is an active community keeping it running and developing it further. But to survive long term, the project needs funding.

Thunderbird is currently transitioning to an independent organization. Being independent, we can shape our own fate, but there is significant infrastructure that must be maintained to deliver the application to our tens of millions of users. For Thunderbird to survive and continue to evolve, we need your support and ask for your donation today. All the money donated will go directly to funding Thunderbird development and infrastructure. Donate to Thunderbird

Thunderbird is the leading open source, cross-platform email and calendaring client, free for business and personal use. We want it to stay secure and become even better.

If you like Thunderbird, please consider a donation! By donating, you will help us to continue delivering an ad-free top-notch email client. Make a donation Other ways to contribute to Thunderbird

Now is a great time for you to get involved: writing code, testing, support, localization and more. Join a global community! Share your skills and pick up a few new ones along the way. Volunteer as much as you like. Or as little. It’s totally up to you. Learn more Need Support?

Most Thunderbird support questions are answered in the Knowledge Base. If you can’t find an answer, ask your question in our support forum.

then everything stops.

Normally it checks and downloads new messages. this does not appear to happen. When I click on the 'get messages' button the bar at bottom of thunderbird screen shows my email address and 'Connected to mail.sasktel.net...' and nothing farther.

The error console info suggests corruption to me.

Could not read chrome manifest 'file:///C:/Program%20Files%20(x86)/Mozilla%20Thunderbird/chrome.manifest'. Could not read chrome manifest 'jar:file:///C:/Program%20Files%20(x86)/Mozilla%20Thunderbird/extensions/%7B972ce4c6-7e08-4474-a285-3208198ce6fd%7D.xpi!/chrome.manifest'. While creating services from category 'profile-after-change', could not create service for entry 'Sapi Speech Synth', contract ID '@mozilla.org/synthsapi;1' Timestamp: 9/13/2016 12:39:08 PM Warning: Unknown property 'grid-auto-columns'. Declaration dropped. Source File: resource://gre-resources/ua.css Line: 175, Column: 19 Source Code:

 grid-auto-columns: inherit;

there are 7 more of these 'grid' messages

Timestamp: 9/13/2016 12:39:11 PM Error: An error occurred during a connection to mail.sasktel.net:110.

Cannot communicate securely with peer: no common encryption algorithm(s).

Error code: <a id="errorCode" title="SSL_ERROR_NO_CYPHER_OVERLAP">SSL_ERROR_NO_CYPHER_OVERLAP</a>

1473792309594 addons.update-checker WARN Update manifest for {972ce4c6-7e08-4474-a285-3208198ce6fd} did not contain an updates property

Can you tell from the above where my problem is? I have tried to use 'print screen' but can not get it to work. I hope this gives you enough info to understand my problem and thankyou for your help.

Can you tell from the above where my problem is?

This is your problem: Cannot communicate securely with peer: no common encryption algorithm(s).

Talk to your email provider. Possibly they screwed up their server configuration.