There is probably a residual of the trojan in the start menu. I doubt that it's doing any harm except that it's trying to invoke the trojan at startup. Click Start - Run, then in the box type msconfig and click OK. Click on the Startup tab and see if there is anything suspicious there. If there is, untick the box alongside it and OK out of the dialogue box. Restart the computer and see if it's OK. I find Regseeker good for removing registry calls to non-existent programs click here, and select "Clean the Registry". Other forum members probably have their own favorites.