System on Vista, XP and Win7 works ... Software, however, is getting used to or still in "infancy", "but better than nothing." Direct understandable for me to send feedback of changes missing. Especially mysterious is the 12h interval where you never really know if the pump had now understood or accepted or not. Whereby aufzwängte me the question why "only" 12 hours, and not freely definable ... Or 3 or more intervals? However, it is the only way the system approximately "comfortable" to set if you want to have intervals. By saving settings you should not give because it is not working. At least it will not appear in the software. Bitchy and the "COM" was finding to USB ... -> Clumsy solved! When "USB" insertion, it should also be a USB device and not prove a "COM" port to one still ev. Still to adjust, especially when "all" are occupied, which just wants to have the software ... So hard to understand for "non-PC Savvy". Cable also much too short ... adaptation expensive ... (USB to LAN, WLAN I do not know whether the then so work; this would be too expensive) Those who have are its PC under the aquarium or a laptop ... Worked with 6m USB extension