Starting point escalation

Howdy,

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 “psexec.py adminstrator@10.10.10.27” command in order to flag the admin desktop. Thing is, psexec.py 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!