Cannot run Backbox

[EUKILLER]

A few days ago I was using my pc normally when it froze, and a few minutes later it suddenly shutted down, now every time I turn it on displays this error:
Ldm_parse_privhead(): Cannot find PRIVHEAD structure. LDM database is corrupt. Aborting. ldm_validate_privheads(): Cannot find PRIVHEAD 1.
Cthing mode page found
[sdb] assuming drive cache: write through
With a lots of " [(3°*¨ " or something like that between, and following that the backbox charging screen and the pc reinitiating every 3 seconds...
Help Please :'(