Windows XP, Windows Vista, or Windows 7 (32-bit is highly recommended). Modern versions like Windows 10 and 11 often fail to recognize legacy USB drivers.
Do not touch the phone, unplug the cable, or allow your PC to go to sleep during this time. Step 5: Finalization Htc Pda Phone Rom Update Utility 3.27.4.3 Free Download
Most HTC devices shipped with a locked bootloader (Stock SPL). If you attempt to flash a custom ROM or a firmware version intended for a different carrier using RUU 3.27.4.3, the utility will throw an or Error 300: Invalid Update Utility . You must first unlock your device using a custom bootloader installer like Hard-SPL . 2. Desktop Driver Requirements Windows XP, Windows Vista, or Windows 7 (32-bit