Windows fails to start!!! Answered

I went to turn on my pc today, and it booted up like normal, execpt, before the windows loading screen came up, i got a blue-screen, but an un-usual one, saying that sypt.sys (or something similar) has encounted an error, and then says "Try disabling BIOS memory options, such as shadowing or chaceing, this error message apears every time during the boot of XP, nomatter what, safe-mode, last known good config, start up normally, can i just repair windows, or is this a full install, or (i dread) HDD failure? Usx9