An attempt to list containers on a server with Parallels Containers for Windows using
vzlist -a returns the error:
There is no Parallels Container installed
Running Virtuozzo-related commands requires administrative access.
The most probable cause of such error is that you are running a command-line tool as a non-privileged user or UAC is enabled.
Locate the "Command Prompt" tool in the menu, right-click on it and choose "Run as" > "Administrator".