CIM/WMI cmdlets in PowerShell - Step-by-Step Execution

Concept Flow - CIM/WMI cmdlets

Start PowerShell

↓

Use Get-CimInstance or Get-WmiObject

↓

Specify Class or Query

↓

Retrieve Data from System

↓

Display or Use Data

↓

End

The flow shows how PowerShell cmdlets query system info using CIM or WMI classes and then output the data.

Execution Sample

PowerShell

Get-CimInstance -ClassName Win32_OperatingSystem

# Shows OS info like name, version, and architecture

This command fetches operating system details from the computer using CIM cmdlet.

Execution Table

Step	Action	Cmdlet Used	Class Queried	Result Summary
1	Start PowerShell session	N/A	N/A	Ready to run commands
2	Run Get-CimInstance	Get-CimInstance	Win32_OperatingSystem	Query sent to system
3	System processes query	N/A	Win32_OperatingSystem	System gathers OS info
4	Receive data	N/A	Win32_OperatingSystem	OS info object returned
5	Display data	N/A	Win32_OperatingSystem	Shows OS name, version, architecture
6	End	N/A	N/A	Command finished

💡 Command completes after retrieving and displaying OS information.

Variable Tracker

Variable	Start	After Step 2	After Step 4	Final
$osInfo	null	null	Object with OS data	Object with OS data

Key Moments - 3 Insights

Why do we use Get-CimInstance instead of Get-WmiObject?

Get-CimInstance uses newer CIM protocol which is faster and more compatible; see execution_table step 2 where Get-CimInstance is used.

What does the class Win32_OperatingSystem represent?

It represents the operating system info on the computer; execution_table step 3 shows system gathering data from this class.

What type of data do we get back from the cmdlet?

We get an object with properties like OS name, version, and architecture as shown in variable_tracker after step 4.

Visual Quiz - 3 Questions

Look at the execution_table, what cmdlet is used to query the OS information?

A Get-Service

B Get-Process

C Get-CimInstance

D Get-EventLog

💡 Hint

Check execution_table row 2 under 'Cmdlet Used'

At which step does the system gather OS info according to the execution_table?

A Step 2

B Step 3

C Step 5

D Step 6

💡 Hint

Look at execution_table row 3 under 'Action'

If we used Get-WmiObject instead of Get-CimInstance, what would change in the execution_table?

A Cmdlet Used would show Get-WmiObject instead of Get-CimInstance

B Class Queried would change

C Result Summary would be empty

D No change at all

💡 Hint

Focus on execution_table row 2 'Cmdlet Used' column

Concept Snapshot

CIM/WMI cmdlets let you get system info in PowerShell.
Use Get-CimInstance or Get-WmiObject with a class name.
Example: Get-CimInstance -ClassName Win32_OperatingSystem
Returns an object with system properties.
Get-CimInstance is newer and preferred over Get-WmiObject.

Full Transcript

This visual execution shows how to use PowerShell CIM/WMI cmdlets to get system information. First, you start PowerShell and run Get-CimInstance with a class name like Win32_OperatingSystem. The system processes this query and returns an object with operating system details. The data is then displayed. Variables like $osInfo hold the returned object. Key points include preferring Get-CimInstance for better performance and understanding that classes represent system info categories. The execution table traces each step from command start to finish, helping beginners see how the cmdlet works internally.