Ruu-shooter-u-ics-35-s-htc-asia-tw-3.28.709.3-radio-11.77.3504.00u-11.25.3504.06-m-release-270747-signed.exe

Your device must belong to the HTC__621 (Taiwanese) Customer ID family unless your phone has been modified to an S-OFF (Security Off) state. You can check this by booting the phone into HBOOT mode (Power + Volume Down).

If you want, I can:

Indicates this is a ROM Update Utility executable. Your device must belong to the HTC__621 (Taiwanese)

This usually means your phone's bootloader is unlocked. Run fastboot oem lock in a command prompt before restarting the wizard. Your device must belong to the HTC__621 (Taiwanese)