My thought is your software is scanning for Rootkits and upon conclusion of the scan it will report if it finds anything. This was reported in another thread to McAfee the wording used if causing some concerns.
As Tom says it should say Scanning for rootkits if it does not say something detected you are fine. We mods reported this to Mcafee and it will be changed in a future patch.
The quick scan issue has been fixed and will be in the next version released.