Create shared folder with [WMICLASS]"Win32_Share" - powershell

Question

I'm using a PowerShell script that creates local share folder.
function shareCacheFolder() {
  $Sharename = 'cacheFolder'
  $Foldername = 'c:\cacheFolder'
  if (!(Get-WmiObject Win32_Share -Filter "name='$Sharename'")) {
    $Shares = [WMICLASS]"Win32_Share"
    $Shares.Create($Foldername, $Sharename, 0)
  }
}
This seems to work on most machines. But not on mine.
I'm getting this output:
__GENUS : 2
__CLASS : __PARAMETERS
__SUPERCLASS :
__DYNASTY : __PARAMETERS
__RELPATH :
__PROPERTY_COUNT : 1
__DERIVATION : {}
__SERVER :
__NAMESPACE :
__PATH :
ReturnValue : 8
PSComputerName :
I've also tried using this convention:
function shareCacheFolder() {
$path = "c:\cachefolder"
$name = "cachefolder"
$type = 0
$password = ""
$description = ""
$max = 100
$access = $null
  if (!(Get-WmiObject Win32_Share -Filter "name='$Sharename'")) {
Invoke-WmiMethod -Class Win32_Share -Name Create -ArgumentList $access, $description, $max, $name, $password, $path, $type
  }
}
I'm using PowerShell version 3.

Answer 1

As documented the return code 8 means "unknown error". The command is syntactically correct and works on other computers, so the issue is not with your code. The problem is also unlikely to be caused by a share name conflict, missing folder, permission issue, etc., as those would cause different errors/return codes.
I suspect that on your system the Server service is not running. Verify that with the following command:
Get-Service 'Server' | Select-Object StartType, Status | Format-List
The start type should be "Automatic", and the status should be "Running". If they're not, change the start type and start the service like this:
Get-Service 'Server' | Set-Service -StartupType 'Automatic'
Start-Service 'Server'