All she should have needed to say in defense, at the outset -

Your Honor, my school system uses Microsoft Windows\ufffd.
Few such systems, connected to a high speed network can be relied upon to remain malware free - beyond "several minutes", in many cases. I have some professional estimates along these lines and a (partial) listing of thousands of known similar examples, now infecting millions of users of this 'system'.


Judge:
Case dismissed - demonstrably No One is Safe, using this product.


Parallel universe