Updated bios and now windows won't start

I updated the bios on my motherboard earlier in the hopes of installing a AM3+ cpu, now when i turn on my computer windows won't start. The bios and post work. and i can play on the bios as much as i want, but after exiting the bios i only get a black screen with a blinking white underscore in the top left corner, I also have an oem version of windows which I'm not sure if I can re-install? advice please? (I'm using an asus crosshair V formula motherboard)
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  1. Generally when this happens, Update bios then Windows does not restart, The problem is normally that the Bios selection for controlling the HDD has changed.
    Normal selections are Sata, AHCI, and IDE. Try changing to IDE, reboot - no work then try AHCI.
  2. RetiredChief said:
    Generally when this happens, Update bios then Windows does not restart, The problem is normally that the Bios selection for controlling the HDD has changed.
    Normal selections are Sata, AHCI, and IDE. Try changing to IDE, reboot - no work then try AHCI.


    As stated above, flashing bios resets hdd mode.... Usually IDE by default. Changing to AHCI worked for me and should work for others as well. Also, on gigabyte boards, AHCI gives option for Intel rapid technology which loads operating system extremely fast!
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