Uptime.wsf or uptime on windows server


Hi all, Please help I am tearing my hair out.

We have nagios 3 installed on Centos (local) and are using NRPE_NT on a remote window 2003 server.
I am looking to check the uptime on this remote server.

We are putting the command argument into nrpr.cfg on the remote host and launching the arguments from there.
I can see that the remote host is running two WSF files at present to report on disk usage, can someone help em configure one to check uptime or point me in the right direction please.