I am NOT a programmer nor do I want to be. I have checked my firewall and anti virus and they are fine. Maybe I am not making my self clear:No problem with MBAM from 03/28/2010backwards. NOTHING. As soon as I installed it,problems. I have install/unistalled several times,cleanit,checked the settings in the firewall. When I turn OFF the firewall and it does update with no problem. I am using NORTON 2005 and have had no problems with any other software. I am not about to start "fiddling"with the registry and turn my PC into a brick.There is something in the installation code of MBAM that has changed since 03/29/2010. Sorry if I am grabby about this ,but I don't fool with stuff that I don't know that much. As stated before,MBAM is a sterling company, and they will respond to this soon,I hope.