[q] no os in htc one topic

Hi ,

i have a HTC ONE mobile phone, few days before i tried to install cyangonMod but unfortunately due to faulty USB my installation broke up.
so i ended up with no OS installed on my HTC ONE. later i searched out the forum and rooted back to the ROM as it was.
i founded links for the RUU zip files to install but since my phone is not linked with any operator, i have no clue which link to use.

my friend suggested me a link which was
RUU_M7_UL_JB_50_HTC_Europe_1.20.401.1_Radio_4A.13. 3227.06_10.27.1127.01_release_308001_signed_2_4

when i try to install the zip using the following commands

fastboot oem lock

fastboot oem rebootRUU

fastboot flash zip RUU_M7_UL_JB_50_HTC_Europe_1.20.401.1_Radio_4A.13. 3227.06_10.27.1127.01_release_308001_signed_2_4.zi p

i received following error

sending 'zip' (1010948 KB)...
OKAY [ 46.936s]
writing 'zip'...
(bootloader) signature checking
FAILED (remote: 12 signature ve
finished. total time: 133.252s

I have been trying all different ways but so far no solution.
could any one help me get back to my Android please

if my question is not clear or need any explanation please dont hesitate
Thank you in Advance