Greetings. I truly like ProcessGuard and the protection it offers, as well as all of the DCS products I have. I have noticed that on occasion when I try to manually add an executable file to the protection list, I get the message "There was an error adding the file you selected to the list. Please ensure that it isn't already in the list and that it is an executable file." When I check to see if it is in the protection list, it is not. If I try opening up the file in Learning mode, it still is not added to the protection list, although it may appear in the Security list. For a test, I tried to add calc.exe to the protection list, and I got the above error message. I opened calc.exe in learning mode, and it still was not added to either the protection or the security lists. I have also noticed this when adding game programs to my system where mouse hooks were needed. Previously, PG has been working OK in both initial installation and everyday use. I have only noticed a problem with this within the past few weeks. Right after version 3.150 came out I updated PG using the prescribed procedure of saving my pghash.dat and pgguard.dat files and making the necessary adjustments for ProcessGuard in the registry. I am running on Windows XP SP2 updated, with NAV 2005 ZA Pro Proxomitron Giant Antispyware TDS-3 Wormguard (trial) spybot Spywareblaster Spywareguard Any advice would be appreciated. Thanks.