What To Do When Windows Installation Fails At 99%

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When you experience a 99% failure during the Windows installation process, don’t worry – it’s not uncommon. Here are some troubleshooting steps and potential solutions to help resolve the issue:

Initial Troubleshooting Steps

• Restart your computer: Sometimes, simply restarting can resolve the issue.

• Check for disk errors: Ensure that all disks (C, D, E, F) are free of errors using the built-in Check Disk utility or third-party tools like SFC (System File Checker).

• Update Windows drivers: Outdated drivers might cause installation issues. Update your drivers to the latest versions.

• Disable any recently installed software: Remove any recently installed applications that could be interfering with the installation.

System Restore

• Use System Restore: If you have enabled System Restore, you can try restoring your system to a previous date when the installation was successful.

• Check System Restore logs: Ensure you’ve saved the System Restore logs in case you need to revert back.

In-Install Troubleshooting Steps

• Run the Windows Installation Wizard again: Try running the installation wizard from within the installation media (USB or DVD).

• Disable UEFI Secure Boot: Some systems require UEFI Secure Boot to be disabled before installing. You can try disabling it using the UEFI settings.

• Update the BIOS: Ensure your motherboard’s BIOS is up-to-date, as outdated versions might cause issues.

• Reset the Windows installation media: If you’ve modified the installation media (e.g., burned a custom image), reset it to its original state.

Additional Troubleshooting Steps

• Check for corrupted system files: Run a built-in scan using the System File Checker (SFC) tool or third-party tools like CCleaner.

• Use a different network connection: If you’re connecting via Wi-Fi, try switching to Ethernet (if available).

• Disable any additional drivers or services: Look for additional drivers or services that might be causing conflicts.

Advanced Troubleshooting Steps

• Try the Windows Recovery Environment (WinRE): To access the WinRE environment, press F8 repeatedly during boot.

• Run a System Configuration tool: The System Configuration tool can help identify and resolve installation-related issues.

• Check for registry errors: Use a registry cleaner or tool like CCleaner to inspect and repair any potential registry errors.

Last Resort

If none of the above steps work, it’s possible that:

• Your system is corrupted or damaged beyond recovery.

• The installation media is damaged or corrupted.

• You’ve attempted to install Windows on a different hardware configuration or platform.

In this case, consider seeking professional assistance from a certified PC technician or the manufacturer’s support team for further guidance and potential repair or replacement of your system.

Remember that 99% failures are not uncommon, especially during initial installations. If you’re experiencing persistent issues, it may be time to explore alternative options or seek support from professionals.