Thunderbird update keeps failing

1137070 pts.
Tags:
Thunderbird
Windows 10
Hello, About a month ago, I updated my Windows 10 version. Now, I'm in the process of upgrading Thunderbird but it keeps failing on me! Here's the message I'm getting:
The update could not be installed. Please make sure there are no other copies of Thunderbird running on your computer, and then restartThunderbird to try again.
There's no other copy running. I checked Task Manager and nothing. What's wrong here?
1

Answer Wiki

Thanks. We'll let you know when a new response is added.

Check the support page here. You may need to do the install as an administrator if you are sure there are no other versions that may be running. This article covers a lot of scenarios. 

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