As you are a first time poster I'll go easy on you
When you run VeSys you get the option of which product you want to work with (the dialog is called 'VeSys AutoCAD setup'), I would suggest you use this to disable VeSys Design & Harness so that it will not start when you run AutoCAD Mechanical. If you have ticked the "Don't show this dialog box when launching from the VeSys icon" you will not be presented with the option to disable VeSys, you can get back to the dialog by doing the following:
- Click the Start button
- Click All Programs
- Navigate to VeSys Electrical Series folder
- Click "Setup VeSys with AutoCAD"