The problem is that when I boot my computer with Vista Ultimate installed and login immediately once I get the login prompt I have to wait at least 3-4 minutes while Bitdefender basically brings my computer to a halt. I have installed other AV software such as Avast, AVG, NOD32, Kapersky to try and trouble shoot and none of these cause any sort of problem. I can repeat this issue everytime Bitdefender is installed and only Bitdefender.