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Windows PCs crashing worldwide due to CrowdStrike issue
(mashable.com)
This is a most excellent place for technology news and articles.
We also use S1 and while it does often flag false positives, that's a whole heck of a lot better than the alternative. Also I have not noticed it being very resource intensive.
It's overhead is more subtle than task manager can tell. Because of all its watching and monitoring, it slows down applications themselves. Task take longer. Sometime it is by a trivial amount, but I've been able to measure a notable difference in some task with and without S1, even if task manager says all is well.