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Do you have recovery media, or are you able to create recovery media?
There are a few things I can think of that could have happened when your wife unplugged the pc while it was trying to boot.
We'll need recovery media, or installation media to check
- if the system files are intact,
- the data of the hard drive is intact,
- the partitions of the hard drive.
If you have recovery media you'll need to boot from it.
To boot from recovery media, insert the media, go into your BIOS boot options and choose to boot from the inserted media.
Once you have booted from the recovery media you see troubleshooting options, choose the advanced options.
In the advanced options we need the command prompt to check for the system files.
Open command prompt, type the following command and press enter
This could take some time to finish, please let it run and let me know what the output is when it is finished.
For testing the hard drive, there are a few methods which are explained in the tutorials below.
With SeaTools, you can run it outside of Windows and is explained in the tutorial.
HDD & SSD TEST
Run SeaTools to check the integrity of your HDD. SeaTools for DOS and Windows - How to Use - Windows 7 Help Forums
Do not run SeaTools on an SSD as the results will be invalid.
Run chkdsk Disk Check - Windows 7 Help Forums