I would like to see a comparison of registry cleaners that includes Registry FirstAid. I have used this program for 3 or 4 years and feel like it is the best registry cleaner out there. It has 3 levels of registry error categories, green for safe, yellow for caution, and red for unsafe removal. By default, it only removes the green safe entries. It doesn't remove all of them, though. Some are grayed out and cannot be removed. I assume they are in areas of the registry that cannot be modified. I don't know why they are even included on the safe list. I notice that sometimes after cleaning only the green safe entries, a DOS window pops up after reboot and lists about 15 or 20 entries that cannot be found. These entries don't have any effect that I can tell on any programs or devices. I don't know why some safe registry errors that are removed have this effect. I have been running CRC on 3 Vista machines for the last 10 days or so without any problems at all. I like the easy-to-use interface that is laid out similar to all the other Comodo programs. CRC finds and removes more registry errors than Registry FirstAid. But running Registry FirstAid right after running CRC, Registry FirstAid still usually finds and removes about a hundred registry errors that CRC didn't identify or remove. My own personal comparison of the programs indicates that CRC finds and removes more registry errors, but Registry FirstAid finds different registry errors that CRC doesn't find. I wonder if the safety for removal of these additional registry errors that Registry FirstAid finds might be suspect, based on the DOS window that pops up listing files that cannot be found? Anyway, I think CRC is a great product, with some bugs to be worked out for Windows XP machines. This is just another product to add to the list of great products that Comodo has developed over the last several years. I started using the Comodo Firewall Pro immediately when it came out for Vista and it is superb. Now with the Beta releases of CIS, you have taken security to the next level. Keep up the excellent work, as it is very much appreciated. To have a security suite that does what it is supposed to do and is not a resource hog is wonderful. I had a license for ZoneAlarm Security Suite when I was running XP, and it worked well. When they finally came out with their security suite for Vista, my license covered the upgrade. I installed it and ran it for about a week, but the resource usage was totally unacceptable. I uninstalled it and ran just their free firewall until Comodo came out with their firewall for Vista. I ran several free anti-virus programs during the time that Comodo was developing their CAVS3 and CIS. Now I am straight Comodo for my security, except that I also run SpywareBlaster. I look forward to the integration of CMF and BOClean into CIS in the future.