Question [Q]TMo 4.4 Update error. Download corrupted.

I was pushed the KK update for TMo HTC one. The update was dowloaded, after that it verifies the contents of the firmware. It is failing saying "Download is corropted' and asks to dowload again. I downloaded it 3 times , everytime i am getting the same error. I soft reseted the phone and checked and downloaded again. No luck.

Later i killed the 'updater' app and cleared its app cache (some 20kb of data was there) via the setting-> apps-> All- > Updater. Now the in setting when i check for the update it dosen't show me the 4.4 update available

Is there any way by which i can update it via the PC ? I could not find any tool from HTC for it, sync manager dosen't do firmware update.

P.S : Phone is on 4.3 , never rooted, no custom roms. Just network unlocked via network code from T-MObile.

Thanks !!