Double-clicking on C:

On this PC, when I double-click on C: in My Computer, I get a messages saying it can’t find Setup.exe. The message box also has a browse button to browse to the file. If I right-click, then select open or explore, it acts normally. I have checkedthe mouse settings to verify there wasn’t an action problem with the left button. Double-clicking with the left mouse button in every other respect acts normally. Any ideas?

Brian