Click "Update" or "Next." The phone will reboot and show a progress bar. Do not disconnect the cable during this process, or you may brick your phone permanently.
Locate and download the correct .exe RUU file for your specific HTC model. htc android phone rom update utility
RUUs were HTC’s straightforward solution for installing official firmware on specific models, useful for recovery and returning devices to stock. Modern devices and security changes have made RUUs less common; today, unlocking, fastboot images, and custom recoveries are the usual paths for mods, while manufacturers rely on OTA systems for official updates. Always match the RUU to your exact device, back up data, and follow device-specific instructions to avoid bricking. Click "Update" or "Next