My computer management comes up when I click manage Richard.
I also see this argument string under the My Computer dock entry properties, although I am not sure if this has anything to do with it. This much I am sure about is, I didn't create this string when I added My Computer to my dock.
::{20D04FE0-3AEA-1069-A2D8-08002B30309D}
If you don't see an argument string in the dock entry properties for My Computer, you may want to copy this one in just to give it a try. Again, I'm not sure if this has anything to do with your issue, but it's the only thing that I see out of the ordinary.
Let us know what happens and good luck to you!
Cp