http://www.lazywinadmin.com/2013/07/how-to-enable-copypaste-operations.html

Disable-VMCopyPaste.ps1

#requires -Version 3.0
#requires -PSSnapin VMware.VimAutomation.Core
 
function Disable-VMCopyPaste
{
[CmdletBinding()]
  PARAM(
		[string[]]$vm
	)
	BEGIN{
		Write-Verbose -Message "Checking if there is any VI Server Active Connection"
		if(-not($global:DefaultVIServers.count -gt 0)){
			
			Write-Warning -Message "Wow You are not connected to any Vi Server. Use Connect-ViServer first"
		        break
		}
		Write-Verbose -Message "At least one VI Server Active Connection Found"     
		}
	PROCESS{
		TRY{
			foreach ($item in $vm){
				Write-Verbose -Message "$item - Setting the isolation.tools.copy.disable AdvancedSetting to $true..."
				New-AdvancedSetting `
                                        -Entity $item `
                                        -Name isolation.tools.copy.disable `
                                        -Value $true `
                                        -confirm:$false `
                                        -force:$true `
                                        -errorAction 'Continue'
                                        
				Write-Verbose -Message "$item - Setting the isolation.tools.paste.disable AdvancedSetting to $true..."
				New-AdvancedSetting `
                                        -Entity $item `
                                        -Name isolation.tools.paste.disable `
                                        -Value $true `
                                        -confirm:$false `
                                        -force:$true `
                                        -errorAction 'Continue'
				}
		}
		CATCH{
			Write-Warning -Message "Wow Something went wrong with $item"
			}
		FINALLY{}
		}
	END{Write-Verbose -Message "Script completed"}
	}