BSOD symefa.sys Internet Security 2012

I just had the symefa.sys BSOD.

 

Running a fully updated Internet Security 2012 with default settings.

Newly installed and fully updated Vista SP2 32-bit on a Sony Vaio. RAM and DISK tested ok.

 

While the BSOD happened I was copying files from a USB drive and had just started Windows Live mail.

 

There are many old threads about this for 2011 and older versions but they cannot be replied to so I started this one.

 

I have a 450MB kernel dump that I'd be happy to send to any Symantec staff.