How to Repair a Faulty Windows Installation Without Reformatting

If your Windows installation is experiencing issues like frequent crashes, missing or corrupted system files, or overall poor performance, a repair install can help resolve these problems without the need for a complete system reformat. This guide will walk you through the steps to repair your Windows installation using the installation media.

Preparing for the Repair Install

Before you begin, make sure you have the following:

  • Windows installation media (USB drive or DVD)
  • Product key for your Windows version (if prompted)
  • Backup of your important data

It’s crucial to back up your data before proceeding with the repair install, as it will preserve your personal files, settings, and installed applications.

Performing the Repair Install

Follow these steps to repair your Windows installation:

  1. Insert the Windows installation media and restart your computer.
  2. Press a key when prompted to boot from the installation media.
  3. On the “Install Windows” screen, select your language, time, and keyboard input, then click “Next”.
  4. Click “Repair your computer” in the bottom-left corner.
  5. Select “Troubleshoot” from the options.
  6. Choose “Advanced options” and then select “Command Prompt”.

At this point, you will have access to the Command Prompt within the Windows Recovery Environment.

Scanning and Repairing System Files

To scan and repair corrupted system files, follow these steps:

  1. In the Command Prompt, type sfc /scannow and press Enter. This will scan your system files and attempt to repair any issues.
  2. If the SFC command doesn’t resolve the problem, you can use the DISM (Deployment Image Servicing and Management) tool. Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter. This command will download missing or corrupted files from Microsoft’s servers.
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After running these commands, restart your computer and check if the issues have been resolved.

Performing an In-Place Upgrade

If the above steps don’t fix the problem, you can perform an in-place upgrade, which will reinstall Windows while preserving your personal files, settings, and installed applications.

  1. Return to the “Install Windows” screen and click “Next”.
  2. Click “Install now” and accept the license terms.
  3. Select “Upgrade: Install Windows and keep files, settings, and applications”.
  4. Follow the on-screen instructions to complete the upgrade process.

The in-place upgrade will replace corrupted system files and potentially resolve any issues you were experiencing.

If none of the above methods work, you may need to consider a clean install of Windows, which will erase all data on your system drive. However, before resorting to a clean install, ensure that you have exhausted all repair options and have a reliable backup of your important data.

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