Please try the following to manually clean the NavBox software from your PC:
1. Uninstall NavBox sw if it exists in Windows "Add/Remove Programs"
2. Delete the NavBoxSW keys in:
3. Open up an elevated command prompt window (Run as administrator) and run the command:
sc delete navbox
4. Delete the following folders:
5. Reboot PC
If the NavBox sw is still not uninstalled, please try to download and run the Microsoft install and uninstall troubleshooter from the below link:
When starting the program, select that you have problems uninstalling a program and when you get the list of installed programs, choose NavBoxSW and proceed with the uninstall wizard. If the wizard successfully completes, reboot the PC.