Not rooted but still saying busy box is installed!

I downloaded root checker pro to check that my device is rooted or no. When I check it says that root access is not installed in the device but it is saying that busybox is installed. What is this? Is busybox is installed by cyanogen or is it harmfull . I searched on internet it said that a rooted device has busybox. Please someone help me!
I don't want to root my device.:confused:

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