Previously I used my Windows XP Pro system for web surfing without problems. Along the way I picked up some malware problems. I ran numerous runs and several virus cleaners and eventually got error free detection runs and followed that with a reinstall of a fresh copy of Firefox. It didn't seem to help. I still get persistent flags raised of certificate violations. The Internet Explorer does not have the same problem. Any ideas are appreciated. _{edit: removed your mail address from public display, since the only thing it will attract are spam bots. you will be notified per mail once somebody replies to the thread. (philipp)}