You could have given people on here more info, "SESSION5_INITIALIZATIONS_FAILED" is associated with a 0x71 error.
This error seems to be caused at Boot-Up.
Was it caused at Boot-Up Or Sometime around turning the Computer on?
To be specific a corrupt Windows System File, first try a Repair Install with the Windows OS disk. If this doesn't sort the problem could you try to post the MiniDumps as attachments on here.