Trying to delete a reg key in PowerShell as a PS command in MDT.

Question

I'm trying to delete a 'value' of a key in the registry IF it exists. I don't know the action to script if it doesn't exist.

I can run this and it does remove the value if its there, but errors out when the value is not there.

The PS I added to MDT is:

Get-ItemProperty -Path "HKLM:\SOFTWARE\WOW6432Node\Keyname -Name "GUID"
Remove-ItemProperty -Path "HKLM:\SOFTWARE\WOW6432Node\Keyname" -Name "GUID" -ErrorAction Ignore

I want to remove the GUID entry within the key, if it sees it. What is the syntax to just do nothing if it doesn't see it?

Answer 1

This is what worked:

$Path = 'HKLM:\SOFTWARE\WOW6432Node\mykey'
$Name = 'GUID'

    Get-ItemProperty -Path $Path -Name $Name -ErrorAction Ignore
    Remove-ItemProperty -Path $Path -Name $Name -ErrorAction Ignore

Answer 2

Hi, @Rick Someone
Thank you for posting in Microsoft Q&A forum.

You may replace your PS script with this:

function Test-RegistryValue {  
  
param (  
  
 [parameter(Mandatory=$true)]  
 [ValidateNotNullOrEmpty()]$Path,  
  
[parameter(Mandatory=$true)]  
 [ValidateNotNullOrEmpty()]$Value  
)  
  
try {  
  
Get-ItemProperty -Path $Path -Name $Value -ErrorAction Stop | Out-Null  
 return $true  
 }  
  
catch {  
  
return $false  
  
}  
}  
  
  
if (Test-RegistryValue -Path 'HKLM:\SOFTWARE\WOW6432Node\Keyname' -value 'GUID')  
{Remove-ItemProperty -Path 'HKLM:\SOFTWARE\WOW6432Node\Keyname' -Name GUID}  

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Answer 3

This worked without error:

$Path = 'HKLM:\SOFTWARE\WOW6432Node\mykey'
$Name = 'GUID'

    Get-ItemProperty -Path $Path -Name $Name -ErrorAction Ignore
    Remove-ItemProperty -Path $Path -Name $Name -ErrorAction Ignore