Thanks, Emily!  I'm beginning to think the widespread "insufficient resources" errors that started last week may be neither a genuine virus nor malformed update, but an intended and mostly-working update which however is very demanding on the computers.  
This would fit wth the success Russ and Zhang have had with this or apparently related problems by  increasing the actual RAM.  We should start looking in that direction for Fermi, by collecting RAM from the Acers in the big cabinet that aren't good candidates for fixing up themselves.  ==mitch