You can stop worrying, it means that the software, at that moment, was scanning for rootkits. We have asked the developers to reword what is displayed there to stop people panicking.
You could run Stinger and Malwarebytes Free or maybe even RootkitRemover, all linked in the last link in my signature below if it might make you feel better about it ;-)
thanks a lot, i been going around all day, trying to find it
You're welcome. The high CPU could be caused by a number of things, a scan in progress, an update occurring, emails coming in, a backup in progress etc. etc.
If it persists you could try those tools I suggested or....
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