Without experimenting, , , ,
there should be a box in front of 'My Computer', you want a "+" (plus sign) there. The "-" (minus sign) indicates various levels of registry are open.
Clicking a "-" should close a level to a "+", nothing open below.
Messing with the registry can be dangerous!!
However, if you already have it open, clicking the "+" and/or "-" sign boxes does not change anything already set in the registry.
Is this what you want to know??
-c-