Hi there, first post! I have been using NOD32 for a couple of years now, with Windows XP and now with Vista. NOD32 32bit has never gave me any grief or hassle the software seemed to run perfectly. The issue im having started when i installed Windows Vista 64 bit 3 weeks ago, after the install i reinstalled all my usual software and applications, including NOD32 64bit version. I rebooted on that day to a BSOD, i thought nothing off it as i had installed quite a few programs that day. Later on that week the BSOD screen was showing up more often, almost every login. I have 2 user accounts setup on the pc and on both user accounts it would BSOD when logging in. So... A week ago i formated my harddrive and reinstalled Vista 64, i installed only the essentials which were Drivers and set up my email. I went for days with no crashing, so i started to install my other software... I installed NOD32 64bit and straight away on reboot i received a BSOD on log in, it done it 3 or 4 times so i have now uninstalled NOD32 and all is fine. Im sure i cant be the only one with this issue as the Vista 64 install is fresh and nothing but drivers were installed on it. Any information on this is appreciated as im considering jumping over to another AV and as i said i was more than happy with nod32. ----------- Edit Im using the Latest v3 .667, Vista 64 has SP1 installed.