Looks like normal start up logging. I forced a check in the nagios console and the log didn't even register activity.
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:330: On crash: restart: nscp
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:342: Archiving crash dumps in: C:\Program Files\NSClient++/crash-dumps
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:409: booting::loading plugins
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:171: Found: CheckDisk
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:171: Found: CheckEventLog
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:171: Found: CheckExternalScripts
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:171: Found: CheckHelpers
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:171: Found: CheckNSCP
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:171: Found: CheckSystem
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:171: Found: NRPEServer
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:171: Found: NSClientServer
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:775: C:\Program Files\NSClient++/modules\CheckDisk.dll.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:777: adding C:\Program Files\NSClient++/modules\CheckDisk.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:775: C:\Program Files\NSClient++/modules\CheckEventLog.dll.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:777: adding C:\Program Files\NSClient++/modules\CheckEventLog.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:775: C:\Program Files\NSClient++/modules\CheckExternalScripts.dll.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:777: adding C:\Program Files\NSClient++/modules\CheckExternalScripts.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:775: C:\Program Files\NSClient++/modules\CheckHelpers.dll.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:777: adding C:\Program Files\NSClient++/modules\CheckHelpers.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:775: C:\Program Files\NSClient++/modules\CheckNSCP.dll.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:777: adding C:\Program Files\NSClient++/modules\CheckNSCP.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:775: C:\Program Files\NSClient++/modules\CheckSystem.dll.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:777: adding C:\Program Files\NSClient++/modules\CheckSystem.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:775: C:\Program Files\NSClient++/modules\NRPEServer.dll.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:777: adding C:\Program Files\NSClient++/modules\NRPEServer.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:775: C:\Program Files\NSClient++/modules\NSClientServer.dll.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:777: adding C:\Program Files\NSClient++/modules\NSClientServer.dll
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:736: Loading plugin: CheckDisk
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:736: Loading plugin: CheckEventLog
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:736: Loading plugin: CheckExternalScripts
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:736: Loading plugin: CheckHelpers
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:736: Loading plugin: CheckNSCP
2015-10-01 13:47:02: debug:D:\source\nscp\modules\CheckNSCP\CheckNSCP.cpp:48: Crash folder is: C:\Program Files\NSClient++
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:736: Loading plugin: CheckSystem
2015-10-01 13:47:02: debug:D:\source\nscp\service\NSClient++.cpp:736: Loading plugin: NRPEServer
2015-10-01 13:47:02: debug:D:\source\nscp\modules\NRPEServer\NRPEServer.cpp:137: Allowed hosts definition: 10.25.168.196(255.255.255.255)
2015-10-01 13:47:03: debug:D:\source\nscp\include\socket/server.hpp:99: Binding to: [::]:5666(ipv6)
2015-10-01 13:47:03: debug:D:\source\nscp\include\socket/server.hpp:202: Attempting to bind to: [::]:5666(ipv6)
2015-10-01 13:47:03: debug:D:\source\nscp\include\socket/server.hpp:95: Binding to: 0.0.0.0:5666(ipv4), reopen: true, reuse: true
2015-10-01 13:47:03: debug:D:\source\nscp\include\socket/server.hpp:202: Attempting to bind to: 0.0.0.0:5666(ipv4)
2015-10-01 13:47:03: debug:D:\source\nscp\service\NSClient++.cpp:736: Loading plugin: NSClientServer
2015-10-01 13:47:03: debug:D:\source\nscp\modules\NSClientServer\NSClientServer.cpp:91: Allowed hosts definition: 10.25.168.196(255.255.255.255)
2015-10-01 13:47:03: debug:D:\source\nscp\include\socket/server.hpp:99: Binding to: [::]:12489(ipv6)
2015-10-01 13:47:03: debug:D:\source\nscp\include\socket/server.hpp:202: Attempting to bind to: [::]:12489(ipv6)
2015-10-01 13:47:03: debug:D:\source\nscp\include\socket/server.hpp:95: Binding to: 0.0.0.0:12489(ipv4), reopen: true, reuse: true
2015-10-01 13:47:03: debug:D:\source\nscp\include\socket/server.hpp:202: Attempting to bind to: 0.0.0.0:12489(ipv4)
2015-10-01 13:47:03: debug:D:\source\nscp\service\NSClient++.cpp:504: NSClient++ - 0.4.3.143 2015-04-29 Started!
2015-10-01 13:47:03: debug:D:\source\nscp\service\NSClient++.cpp

Starting: DONE