I know this doesn't help your problem, but to avoid it in the future you need to do two things:

1) Get a UPS (Uninterruptible Power Supply)

2) Get an external disk and disk cloning backup-up software (I use Acronis).

The next time Windows wants to update when you shut down, don't shut it down, instead run a backup with your cloning software. When the backup is complete, shut the computer down and let Windows do it's thing.

This not only happens with Windows, Mac does the same thing.

Also backup your drive often to the cloning disk. How often? Depends on how much you use it, what you use it for, and how important the data on your primary HD is to you.

I use Microsoft Sync Toy to back up the data I don't want to lose every day. I do a hard drive clone at least once a week depending on activity, it might be more.

Also, before I install any new program or major update to that program (even BiaB) I clone the disk first.

Running a computer without a backup is like taking your boat out in the ocean without a life vest. Most of the time it's OK, but when it's not OK it is a major problem.

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