Memory Dump

If I'm in the wrong area, please direct me to the right place.

I have a relatively new build, and my first attempt ended with sending back a motherboard for replacement. The system has been mostly stable, until recently. I often return to my desktop to see a "Windows has recovered from an unexpected shutdown" error. Most applications seem to run fine, although these past few weeks, I get a blue screen of death (system memory dump) whenever I'm typing a message in Windows Mail.

I use the PC primarily for video editing/compositing. I use After Effects for hours on end with nary a problem, but if the system is idle or I'm typing an email, I'll often get that blue screen of death.

My system will shut down when I have peripheral USB devices plugged in for an extended period of time (such as a printer), so I thought I might have faulty USB drivers, but everything's up to date. I then thought that perhaps I don't have adequate power to my system, but when I run it through my Kill O Watt everything seems normal.

When I look at the details of the "unexpected shutdown", it specifies two files:

C:\Windows\Minidump\013130-21293-01.dmp
C:\Users\XXXX\AppData\Local\Temp\WER-26754-0.sysdata.xml

I don't know what good this does me because I'm unable to open or view either of those files.

Any thoughts on what the heck might be going on? If I can crunch a CPU/Memory/GPU-intensive After Effects render without a hitch, I'm perplexed why typing an email would zap my system. It'll also sometimes occur if I'm on Facebook/etc., but 9 times out of 10 it's when I'm typing an email.

Strange....