use Win32::Registry;

# $SERVER_PLATFORM = x86 or x64 - i set it before in other function
if ($SERVER_PLATFORM eq "x86")
{
	$Registry = 'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{5C65E4AB-BDF9-4784-968F-2FC6151B1637}';
} else {
	$Registry = 'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B2AE58F9-BF87-4345-9A48-B4C855A484FD}';
}

if ($HKEY_LOCAL_MACHINE->Open($Registry,$hkey) )
{
	print "Found Software YYY installed on the machine\n";
} else {
	print "Software YYY does not installed on the machine\n";
}