Purging local accounts with powershell

I came across this http://richardspowershellblog.wordpress.com/2012/06/08/working-with-profiles-2-deleting-profiles/ and I like the approach it removes all accounts except the administrator account but when I try I get Get-CimInstance error. How can I correct this and how exactly do I run it against multiple systems?

A modified version I tried but get the same error

Get-CimInstance -ClassName win32_group -Filter "name = 'administrators'" | 
Get-CimAssociatedInstance -Association win32_groupuser |
Where-Object { $_.SID -notlike "*-500" } | 
ForEach-Object {
    ([ADSI]"WinNT://.").delete("user",$_.Name)
}

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stlhostAsked:
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QlemoConnect With a Mentor Batchelor, Developer and EE Topic AdvisorCommented:
Get-CimInstance requires PowerShell 3 or later.
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footechCommented:
It also communicates using the WS-Man protocol by default.  So unless you have PS Remoting setup on systems it won't work.  To get around this you can configure CIM sessions with the option to use DCOM, or just use the WMI cmdlets like Get-WmiObject.

Since you don't mention what the error is I can only guess.

It's unclear what exactly you're trying to do and whether you have a specific question.  Your title mentions local accounts, but the blog post is specifically not for local accounts and is in fact meant for deleting only a specified profile.
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stlhostAuthor Commented:
Qlemo was correct I needed powershell 3. What I am wanting to do is purge local accounts except the admin account on remote workstations. There are random accounts and to many workstations to go through manually to check.
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stlhostAuthor Commented:
I did need powershell 3. The rest I figured out thanks
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