PowerShell WMI and CIM Classes and namespaces


Example

There are many classes available in CIM and WMI which are separated into multiple namespaces. The most common (and default) namespace in Windows is root/cimv2. To find the righ class, it can useful to list all or search.

List available classes

You can list all available classes in the default namespace (root/cimv2) on a computer.

3.0

CIM:

Get-CimClass

WMI:

Get-WmiObject -List

Search for a class

You can search for specific classes using wildcards. Ex: Find classes containing the word process.

3.0

CIM:

> Get-CimClass -ClassName "*Process*"

   NameSpace: ROOT/CIMV2

CimClassName                        CimClassMethods      CimClassProperties                                                           
------------                        ---------------      ------------------                                                           
Win32_ProcessTrace                  {}                   {SECURITY_DESCRIPTOR, TIME_CREATED, ParentProcessID, ProcessID...}           
Win32_ProcessStartTrace             {}                   {SECURITY_DESCRIPTOR, TIME_CREATED, ParentProcessID, ProcessID...}           
Win32_ProcessStopTrace              {}                   {SECURITY_DESCRIPTOR, TIME_CREATED, ParentProcessID, ProcessID...}           
CIM_Process                         {}                   {Caption, Description, InstallDate, Name...}                                 
Win32_Process                       {Create, Terminat... {Caption, Description, InstallDate, Name...}                                 
CIM_Processor                       {SetPowerState, R... {Caption, Description, InstallDate, Name...}                                 
Win32_Processor                     {SetPowerState, R... {Caption, Description, InstallDate, Name...}
...

WMI:

Get-WmiObject -List -Class "*Process*"

List classes in a different namespace

The root namespace is simply called root. You can list classes in another namespace using the -NameSpace parameter.

3.0

CIM:

> Get-CimClass -Namespace "root/SecurityCenter2"   

   NameSpace: ROOT/SecurityCenter2

CimClassName                        CimClassMethods      CimClassProperties                                                           
------------                        ---------------      ------------------
....                                                   
AntiSpywareProduct                  {}                   {displayName, instanceGuid, pathToSignedProductExe, pathToSignedReportingE...
AntiVirusProduct                    {}                   {displayName, instanceGuid, pathToSignedProductExe, pathToSignedReportingE...
FirewallProduct                     {}                   {displayName, instanceGuid, pathToSignedProductExe, pathToSignedReportingE...

WMI:

Get-WmiObject -Class "__Namespace" -Namespace "root"

List available namespaces

To find available child-namespaces of root (or another namespace), query the objects in the __NAMESPACE-class for that namespace.

3.0

CIM:

> Get-CimInstance -Namespace "root" -ClassName "__Namespace"

Name            PSComputerName
----            --------------
subscription                  
DEFAULT                       
CIMV2                         
msdtc                         
Cli                           
SECURITY                      
HyperVCluster                 
SecurityCenter2               
RSOP                          
PEH                           
StandardCimv2                 
WMI                           
directory                     
Policy                        
virtualization                
Interop                       
Hardware                      
ServiceModel                  
SecurityCenter                
Microsoft                     
aspnet                        
Appv

WMI:

Get-WmiObject -List -Namespace "root"