Pointor V9 with Windows XP and Windows Vista
Pointor V10 uses some functionality of Windows 7 and Windows 8 which is not available in Windows XP and Windows Vista. For that reason you can still but V9 of Pointor which is compatible with all Windows systems from Windows XP upwards.
Pointor V9 does not have various new features, but apart from that may be suitable for your requirements.
You can download the demo of V9 here.
You can buy Pointor V9 here.