dude,mine does not even log into windows,,,,,,it just powers-off before windows loads,
it's strange, not sure if it a hardware issue,i went into bios setup yesterday checked my cpu temp which was under 40c as normal, cpu fan working, and it did not shutdown,if it was a psu issue,logically it should av powered off after sometime even if i was in setup?i'll do some more checks and update you...