hello
I installed Comodo Firewall 3 days ago.
from that day I have continuous computer issue, after some working time pc is completely blocked. I need of restart it. 
I installed the last version downloaded from you site.
I have windows Xp and AVG like antivirus
Someone has any idea?
Thanks
sergio
Are you running D+ in Paranoid Mode? What configuration are you using?
Please make sure that you add the CFP installation folders to the AVG exclusions. That is to make sure there will be no interactions between AVG and CFP.
Please make sure that there are no left overs of previously uninstalled security programs around. Not all uninstallers do a proper job. Left over applications, drivers or services can cause all sort of “interesting effects”.
Try using removal tools for those programs to remove them. Here is a list of removal tools for common av programs: ESET Knowledgebase .