Computer has to boot twice to start correctly

My computer is of the homebuilt variety. Specs:

Intel i5-760 @ 3.15GHz
Asus P7P55 LX
Gigabyte GTX 460 1Gb
4GB Patriot Sector 5 DDR3-1333
Windows 7 64bit
et al

When I start my computer, it will not boot all the way into Windows. Sometimes it will get into a reboot loop after POST and sometimes Windows will give a BSOD. Reboot does nothing. If I turn off the computer using the power switch, then turn it back on, it boots perfectly. I've gotten to the point where I turn it on, immediately turn it off ASAP, then turn it on again. Works like a charm.

I've flashed the BIOS, reinstalled Windows, reseated the memory, and rechecked all my connections. Any other ideas?
7 answers Last reply
More about computer boot start correctly
  1. First thing to do is follow this guide
    By the way what is the size and brand of your PSU?
  2. Thanks for the link, but everything there checks out.

    I have an OCZ ModXStream 700W.
  3. PSU is fine size wise. Everything points to either motherboard or PSU though causing this issue. What codes do you get on the BSOD´s.
  4. I just tried to replicate the BSODs, but this time, it got to where the microsoft progress bar for windows would come up and just reboot. It did this repeatedly until I turned the computer off and back on, then it booted normally.
  5. Any other ideas?
  6. Did you find a solution to this problem? I have the same exact problem. I'll boot it up and it shuts down. The 2nd time it boots up with no problem.
  7. Possibly a glitch in the standby power circuits inside the PSU. Try to borrow a PSU from a friend. Or pull yours and use another system to test it.
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