Some hidden columns change their state to visible after an intention to edit the column value with right mouse click over the column header (change column view, reset to default view, edit "column name".
There are the following columns:
1) Logged User
2) Computer_OU (hidden - not checked)
3) IP Address
4) Host Name
5) TargetAddress (hidden - not checked)
6) PC Locked?
Columns 2, 5, and 6 definitions belong to Remote Scripting. Both 2 and 5 are hidden, but when I edit or try to edit column 6 or whichever column I choose or cancel the process closing the remote registry window, 2 and 5 become visible.