Hi Leona, are you getting an error on your screen, please provide a screenshot or photo of that error, so that we can provide a solution for you . . .
how do i repair C:windows\system32>
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Anonymous
just need to do the repair. How
Windows for home | Windows 10 | Windows update
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Anonymous
2018-03-19T23:25:39+00:00 Not sure what errors you are receiving but try you can try a couple things.
Right click your start button and select Command prompt (Admin) to bring up elevated Command prompt.
In Command prompt type sfc /scannow and press enter.
Restart the computer.
If that doesn't work then try this,
Right click your start button and select Command prompt (Admin) to bring up elevated Command prompt.
In the Administrator: Command Prompt window, type the following commands.
Press Enter key after each command:
DISM.exe /Online /Cleanup-image /Scanhealth
DISM.exe /Online /Cleanup-image /Restorehealth
Important: When you run this command, DISM uses Windows Update to provide the files that are required to fix corruptions.
To close the Administrator: Command prompt window, type Exit, and then press Enter.
Restart your computer.
If that doesn't work then you will need to do repair upgrade.
Link provided on how to do this.
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Sumit 43,786 Reputation points Volunteer Moderator2018-03-20T04:35:17+00:00 The following steps outline the steps to fix Windows failing to boot and you can boot to the advanced startup options.