I've got a couple ideas--mind you, ideas--you could try.
1) Remove CW 6.2. Plug in the USB adapter (from your notes you did not have it plugged in, correct?) Now try the CW 6.2 installation again. Maybe the adapter has to be plugged in for the installer to find the right file.
2) Maybe the Windows registry got pranged, and you know what that means: unless you're a real wizard at Windows plumbing, the only way to fix that is to backup everything and reinstall Windows. I suspect that's not a viable option.
3) Let's cut to the chase and have you file a SR on that. Click
here to do that.
---Tom