Windows 7 Service Pack 1 inside Bootcamp

:EDIT: I have worked out a solution among my worry, and will post this in case anyone else has this problem with a similar problem on a like machine. It was very simple.

SYMPTOPMS (when booting in Windows is your default OS):
- Windows 7 crashes or restarts when it reaches 30% during the installation of Service Pack 1, step 3, then hangs upon reboot. (BOOTCAMP 3.1)
- Upon restarting, the hard drive spins up, but no OS is loaded, and the screen hangs in the gray start screen seen when initially starting the Mac.
- When holding the OPTION key, no selections appear to boot in OS X or Windows.

SOLUTION (could be specific to my machine):
- Un-hook all devices and external drives, power, keyboard, etc.
- Power machine on and hold F8. This boots into 'advanced mode' where you can access safe mode and an option to roll back to a restoration point.
- Roll back to a restoration point or previous point of a functional OS, then reboot.

NOTE - the computer may have restarted as part of Windows' update process. I recommend selecting the option "START WINDOWS NORMALLY" first, in case the computer got confused when trying to restart. This will finish any update processes, and could sort things back out.

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cwa107 said:

When you hold down the Option key at startup, exactly what happens?

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