For the last couple of months I've been getting a blue screen every week or so.
I've used WinDBG to look at the memory dump and I'm seeing UNEXPECTED_KERNEL_MODE_TRAP (7f) with mfehidk.sys.
I've run MER and attached the TGZ as I have no SR# yet.
Do you have any patch for Mcafee installed? It's written if you open the Console and select Help -> About. There should be something like "Installed Patches 7".