I started getting the BSOD on W7 64bit a couple of days ago. It was intermittent and I didn't really check into the problem. Yesterday it happened a couple of times. Today I could only keep the system running for 5-6 minutes before it happened. I was getting this message PFN_LIST_CORRUPT. I checked on the internet and it said it could be memory, a driver or software misbehaving. I ran a memory checker it was OK. I then remembered ZA had run a virus scan earlier in the day. The scan hung on a certain file number somewhere around 1500 and would not go past it. When this happened I clicked cancel and ZA would not close. So I wondered if ZA was causing the issue. I have been a ZA user for 10 years and I have never had any issues. I deleted ZA and reinstalled ZA. The problem has gone away. Just thought I would post this in case anyone else has the same problem. I'm running ZA 101_079_000.