EFI Firmware Update 1.2. won't install

I can't find exactly my problem but some threads are close. I keep getting software updates for EFI Firmware Update 1.2.
I shut down, then startup holding on-button until it flashes, release, buzz buzz, chime, then very briefly the apple logo and status bar, then gone, buzz buzz, chime and restart. After everything loads, there is the update window with install instructions, telling me to repeat if I see them, to no avail (tried several times over several weeks). My HD appears to be correctly partitioned, with this boot ROM: IM51.0090.B03 which would seem to indicate the update has not happened. I have unplugged all my peripherals (printer, zip drive) but not DSL modem.
any ideas?
thanks in advance
craig

I would delete the firmware updater that is in your Utilities folder and check your account settings(System Preferences/Accounts/Login Items) to see if it has been added to your login items. If so then remove. Re-run your software update and see if the Firmware update shows up again. If so then download and try again. According to Apple your BootROM should be IM51.0090.B09 after the update.
http://www.apple.com/support/downloads/imacefifirmwareupdate12.html

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Message was edited by: karinaelise8

Please give more information , what version of windows are you try to use via boot camp?.
(in the windows installation process the Mac Os Partition will be there if you put the windows in the wrong partition automatically you are formatting and installing windows on the Mac Os partition.
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