Starting point escalation


I’m pretty new to HTB and I’ve been working on the 'tutorial" up until this point and I’m having trouble on privilege escalation. I’m on the “ adminstrator@” command in order to flag the admin desktop. Thing is, isn’t being recognized as a command. I have Impackets installed and running fine and I am in the right directory, so I am not too sure what the problem is. Help would be greatly appreciated, Thanks!