Help! My compaq presario has fallen victim to the sirefef bug and shuts down immediately (with a 60 sec warning) every time it boots. I am operating windows 7, 64 bit I think. I'm such a rookie at these things but I managed to manually remove smart hdd a few months ago myself after some research. This sirefef though has proven nearly impossible since it shuts down constantly. I really need my laptop for my school work. Can you help me please? I noticed you helped several others with the same issue. It seems that the types of sirefef my comp has encountered include AA, AB, AN, B, P, W, and "regular" sirefef.