How did you uninstall greenking, was there an uninstall program or did you just delete the sound drivers from the device manager? I'd recommend that you try both methods before re-installing.
Something else you may want to try:-
From the Start button, choose run, type msconfig into the Open text box and press OK.
This will load the system configuration utility which will hopefully allow you to disable the essspk.exe file either from the WIN.INI tab or more likely from the Startup tab.