Are these rookits a false postive

The detection is based on the hidden activity, after the updates are complete these should be gone if you run another scan.

Just a point though, Deletion is not a good first option, if it succeeds you have no options left, first do no harm and send to chest and investigate. That however, in this case would have given the same access denied error.

The full path can be helpful and to see that you have to expand the column width in the Scan Log.