I installed Nagwin recently and installed Winpre on a test client. The nagwin host says pending for all services except "All Service" and "Current Load". The client states pedning for all services. I checked the logs and it states:
[10-11-2012 17:40:30] Warning: The check of service 'Memory virtual' on host 'testv24' looks like it was orphaned (results never came back). I'm scheduling an immediate check of the service...
it esentially states the same error for all sevrices that are attempting to be monitored. I checked the var/log files and the only one that stated any type of error aside from the above was the nagios-stderr.log file. It stated: "/bin/sh: /plugins/check_winping: /bin/perl: bad interpreter: Permission denied" for for different processes over and over.