u/Akita_Attribute

Solution is to kill the VGC service, and you can repair/reinstall.

But if you see Steam say "Content Downloading" stuck at zero percent, some in the community have said to reinstall the game. Which also fails at 99% saying "Content File Locked", which led me to investigate what file was locked, and what was locking it.

I am not seeking tech support, I fixed it, but not after hunting it down to figure out why my Deadlock crashed. Just posting this for anyone else who experiences "Locked Content File" and "Downloading Content" both being stuck.