Me thinks you got a virus, do a scan and see what that throws up, check the start up items, do a Google and i think you will find a dodgy file, i remember this NT Authority\System as a indication of a infection.
Kitz E Kat
OnePlus 5T review: Hands-on
Illustrator Andrés Lozano on his improv line work, brazen use of colours & hand sketching
iPhone X review
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