Notes from Mercury:Installation wiki on Uninstalling Mercury Service
The Mercury installer is a file copy process. Mercury does also not register itself as an installed software under Windows. Therefore there exists no uninstaller for Mercury.
You use the standard Windows commandline SC to uninstall each Mercury Windows Service instance that you have installed. The example below assumes you named the service Mercury32.
C:\> SC DELETE MERCURY32
In order to uninstall Mercury/32 from your machine, simply delete the shortcuts from the windows start-menu and also delete the entire Mercury Directory.