The program monitors your computer and warns you in case of changes. You decide whether to include or not to include elements in the scan process from the control panel.
There are two different levels: regular and expert.
Registry keys, users, host files, new registered services, hidden windows,...
In the expert level we find new drivers, TCP/IP protection, file changes in critical folders and other important files or components.
In short, if you want to know if everythin goes well on your computer, Patriot NG can be very helpful.