ELRO HIS20USB Security & home automation system USERS MANUAL - Manual (Page 3)

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If your system is running on a non-Windows Vista OS,
simply install Home Integrated System in the default
path.
However, if your system is running on Windows Vista
OS, do not install the application in the default path
(C:\Program Files\NLRO\Home Integrated System);
instead, change the installation path to D:\Home
Integrated System. The reason for this additional step
is because the system will write all relevant information
in the folder where you have installed Home Integrated
System when the application is running. However,