Unable to start Photoshop because the file is locked.

Hello,

I’m unable to start PS from the CC desktop app nor starting PS from Win start menu as administrator.

I am getting the error message:

“Could not complete your request because the file is locked, you do not have necessary access permissions, or another program is using the file. Use the ‘Properties’ command in the Windows Explorer to unlock the file.

I rebooted my Win system to make sure no active processes was locking any files. I started Photoshop and immediately I get this error message. It doesn’t say which file is locked so that makes it hard to troubleshoot.

What can I do in this situation to resolve this?