[Q] How to remove tampered Htc Desire 816 with Relocked and S-ON?? topic

Can somebody plz guide me thru how to unlock this tampered and relocked htc desire 816 with S-on? Im new to this and i hav no idea what to do. I had rooted my device and wanted to unroot and place it to RUU stock mode. I used fastboot mode to send the required files for flashing but it gets stuck in between. And it shows Relocked HTC with tampered and security warning with S-ON. Plz help guys. And btw my HTC desire 816 dual sim is from india.