Over the past few years I've had the opportunity to use PrivateFirewall as my main FW/HIPS/Anti-Logger app with a few hiatuses to test out other highly recommended alternatives. I always seem to come back due to its effectiveness, small (unbloated) size and low resource consumption. Additionally, though some complain about its user interface being somewhat dated, I've always found the app to be more intuitive than most of its competitors. Since I always ensure that I export and save my settings, I rarely have a problem with reinstalling and picking up where I left off...and any new apps or processes are easy enough to add to the mix. One area where I'm not particularly savvy is in making changes to the firewall settings once the larger overall protection levels are set via the user interface. The default firewall settings (for "System" and "System Services") can be seen (for XP) in the following post: https://www.wilderssecurity.com/showpost.php?p=2044408&postcount=27 I was wondering if some of you might want to share your own tweaks to any of the settings to enhance security...and if so, please be specific as to why you made the change and how, specifically, to go about making the change. (Consider discussing changes to svchost and services.exe) In addition, if you wish to share any customized tweaks to apps listed in the "Process Monitor" section, (internet facing apps, etc.) please feel free to share those with us as well. (Again, providing the reason for the change and the specific rules which were modified.) Thanks in advance for taking the time to respond. Hopefully this thread can become a good resource for those using PrivateFirewall as one of the mainstays of their computer security.