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These guides will show you how to install,resintall and repair Windows.
One of the main reasons most people wish to reinstall Windows is due to startup problems and errors within the operating system.
If Windows is not booting it is recommended to try the troubleshooting repair options before any reset or reinstall
If you get no boot device found error, make sure the hard drive is seen in BIOS.
Ran onboard diagnostics(many manufactures have this built in feature in their motherboard) if needed to verify the health of the drive.
If the test fails the drive needs to be replaced. If the test passes, proceed with troubleshooting steps.
Select the Operating System you want to work with in the bottom.
Use this link to download Windows 10 and create Windows 10 installation media with Microsoft if needed.
Click here