PsExec.exe- The network path was not found

Try to see if you can access the admin share on target machine.

Use the -u & -p options to pass-on the administrator login details but if you're on a domain and the target system is not, or the other way around, you'll have to provide the proper user parameters too (domainusername if target is on domain, or username if you're the one on the domain and target is not or if domain differ).