Remove Untrusted Source Warning

I need a Windows application developer to modify my internal data management tool. Currently, it shows an "untrusted source" warning during installation. I need this warning removed to streamline the installation process.

Ideal Skills and Experience:
- Proficiency in Windows application development
- Experience with application signing and certification
- Knowledge of security protocols related to software installation
- Ability to ensure software meets Windows security requirements

Please provide examples of similar work done.