It was designed that wmic is called only once to obtain the system environmental data. Apparently, at every NetBeans IDE startup, wmic is invoked 5 times repeatedly. It is called on every call of RegistrationData.loadFromXML().

       at java.lang.Thread.dumpStack(Thread.java:1206)
       at org.netbeans.modules.servicetag.WindowsSystemEnvironment.getWmicResult(WindowsSystemEnvironment.java:121)
       at org.netbeans.modules.servicetag.WindowsSystemEnvironment.<init>(WindowsSystemEnvironment.java:75)
       at org.netbeans.modules.servicetag.SystemEnvironment.getSystemEnvironment(SystemEnvironment.java:83)
       at org.netbeans.modules.servicetag.RegistrationData.initEnvironment(RegistrationData.java:241)
       at org.netbeans.modules.servicetag.RegistrationData.<init>(RegistrationData.java:235)
       at org.netbeans.modules.servicetag.RegistrationDocument.load(RegistrationDocument.java:125)
       at org.netbeans.modules.servicetag.RegistrationData.loadFromXML(RegistrationData.java:426)
       at org.netbeans.modules.reglib.NbServiceTagSupport.getRegistrationData(NbServiceTagSupport.java:373)
       at org.netbeans.modules.reglib.NbServiceTagSupport.getNbServiceTag(NbServiceTagSupport.java:453)
       at org.netbeans.modules.reglib.NbServiceTagSupport.createNbServiceTag(NbServiceTagSupport.java:171)
       at org.netbeans.modules.registration.NbInstaller.restored(NbInstaller.java:98)
       at org.netbeans.core.startup.NbInstaller.loadCode(NbInstaller.java:419)
       at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:340)
       at org.netbeans.ModuleManager.enable(ModuleManager.java:936)
       at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:428)
       at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:364)
       at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:276)
       at org.netbeans.core.startup.Main.getModuleSystem(Main.java:163)
       at org.netbeans.core.startup.Main.start(Main.java:314)
       at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:110)
       at java.lang.Thread.run(Thread.java:619)