Fuj to je hnusný interface. Podařilo se mi doklikat až na stránky výrobce (a není to úplně jednoduché a tam píšou:

Which are the operating systems that are supported by Stealth KeyLogger?

Stealth KeyLogger is compatible with WindowsXP, Windows2000, Windows2003, Windows Vista . To properly work on Windows Vista, Stealth Keylogger has to be installed using the administrative rights.