On each server that you want to monitor you have to download the script and enable external scripts, you can add that line (shown in your link) to your NSC.ini
commandwindows_updates=c:\windows\system32\cscript.exe //NoLogo //T:120 c:\nrpe_nt\plugins\check_windows_updates.wsf /w:0 /c:1
Always be careful of scripts and at the very list skim through them.
Then on your nagios installation create a new service check or a new command on your commands.cfg.
It should look like (if you set it as a command)
command_line /usr/lib/nagios/plugins/check_nrpe -H $HOSTADDRESS$ -p 5666 -c commandwindows_updates