Default [Q] Stuck in bootloader s-on and tampered

Hi everyone. I searched for around half an hour through google and failed to find a situation identical to mine (maybe i havent looked long enough).

I was one step away from resetting the warranty by removing root and locking bootloader again so that i could send it to HTC for repair (its under warranty.

I locked the bootloader and turned s-on. Then after flashing a stock ruu (i was sure i had the correct version) it returned to bootloader and all of a sudden it says TAMPERED again with s-on..

The phone now will not get out of bootloader. Since its s-on i cant flash a rom or recovery or flash a ruu. When trying to flash a stock ruu it says signature verify fail

ran fastboot getvar all
Phone details:
Bootloader: 1.44.0000
Baseband 4V.13.3231.27

Currently TAMPERED bootloader, LOCKED with S-ON.

How do i now get s-off again from this position?

Thanks in advance!

UPDATE:::: I unlocked bootloader through HTCDEV. THis can be closed