Would suggest you to check in task manager, if Lightroom is shown in the list of running processes or not.
Also, restart your machine once and then, check.
Update to Lightroom 6.5: Keeping Lightroom Up-to-Date
The task manager does not show LR open.
I cannot check the version per the instructions (since I cannot open LR), but I downloaded the update, restarted, still no joy
Login into windows with a new user account and then try to start Lightroom.
Another step: Try to reinstall Lightroom (Deinstallation and the installation).
Thanks for the update.
Additionally, I would suggest you to repair the installation of Microsoft Visual C++ Redistributable 2012 Update 4 from this link: Download Visual C++ Redistributable for Visual Studio 2012 Update 4 from Official Microsoft Download Center
Thank you!! The Microsoft visual (whatever that is) download worked