param(
[string]$msi
)
$errorActionPreference="Stop"
$drivePath="%SYSTEMDRIVE%"


$regkey = 'HKLM:SOFTWARE\ManageEngine\OpManagerAgent'
if(Test-Path $regkey){
		$agentVersion =(Get-ItemProperty $regkey).AgentVersion
}
else{
	$regkey = 'HKLM:SOFTWARE\WOW6432Node\ManageEngine\OpManagerAgent'
	if(Test-Path $regkey){
	$agentVersion =(Get-ItemProperty $regkey).AgentVersion
}
}
if( -not $agentVersion)
{
#Write-Output $PSScriptRoot
[string]$msiFile = "$PSScriptRoot\$msi"

cmd /c "msiexec.exe /i $msiFile  ENABLESILENT=yes REBOOT=ReallySuppress /qn MSIRESTARTMANAGERCONTROL=Disable ALLUSERS=1 /lv $DrivePath\opmagentInstaller.log"
}

#Set-ExecutionPolicy RemoteSigned - cmd to allow PS scripts