Why won't my htc 626 start. ack up?

This is what it says:

*** Software status: Modified ***
*** LOCKED ***
*** Security Warning ***

<VOL UP> to previous item
<VOL DOWN> to next item
<POWER> to select item

REBOOT
REBOOT TO BOOTLOADER
BOOT TO DOWNLOAD MODE
POWER DOWN

I have tried all of these options, and nothing worked. What am I supposed to do? I need this question answered, ASAP, AND IMMEDIATELY. I really need my phone.

THANK YOU

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