Windows - Delayed Write Failed

I routinely get an "Windows - Delayed Write Failed" (see attached) error when I use SW2009 or SW2010.  It usually happens or occurs after I've been working in SW for a couple of hours.  Has anyone else experienced this?  We've been unsuccessful in diagnosing what causes the error.  When we get the error, we have to save over any files that we may have open, and restart our workstations to make it go away.  Any suggestions?

SolidworksAdministration