Unhappy [Help] HTC One Stuck in RUU Screen

Hi guys,
Usually I don't need to post for help by I am desperately in need of help I was updating my device to the 4.4.2 Sense ARHD Rom and was flashing the firmware zip and the fastboot errored out and now it is stuck on the silver HTC screen and fastboot is not recognised. When running fastboot it just says waiting on device. Any help would be great.