N360 running when computer not idle

N360 just suddenly started - either a full system scan or it's defragging all my HDs.  It's been running for about 40mins now.

My computer wasn't idle when it suddenly started.  When I click in the CPU Performance window I see N360.exe and svchost.exe are running.

Anyway of finding out what N360 is actually doing, and why did this start while I was still using my computer.  I thought N360 did this stuff in the background and when the computer's idle.

I have the latest N360 running in Windows 7 Home Premium.

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