METOD 1.

1- flash NON-ROOTED RUU from op
2- boot up android, download the 15mb OTA
3- apply the OTA, reboot in android
4- copy the 4.4 OTA provided few pages ago in the sdcard root named update.zip
5- power off, boot up in bootloader with VOL - and Power
6- select RECOVERY, let it boot in the android icon with the red exclamation mark
7- press VOL + and Power for 2 sec, wait the five sdcard mount error
8- select update from phone storage, select the 4.4 update.zip
9- let it apply, reboot to let it flash the radio firmware
10- enjoy




METOD 2.

wait the RUU.
HTC One - Google Edition