Original message (Jan 27, 2018):
Earlier this morning, we published a protection update that caused connection issues for many of our customers. As a side effect of the web protection blocks, the product also spiked memory usage and possibly caused a crash. We have triaged this issue and pushed a protection update that resolves it.
If the update does not resolve the issue automatically for you, please shut down web protection, check for protection updates, and restart your computer.