It happens about half of the time
I'm running from my internal HD
It is installed in Windows (C:) BB
I'm running windows 8.1
I have an AMD FX 8300 8 Core 3.3ghz 12 GB ram
I use a M-Audio Mobile Pre interface
I use USB for midi
I use NI Bandstand as my default vsti
The only VST plugins I use on RB are NI Guitar Rig 5 and Toontracks EZMix
Task manager does not show BBW running when it happens

It happens often enough that I thought someone else would have a similar experience