How to Repair Windows 10 with In-Place Upgrade

An in-place upgrade reinstalls Windows 10 over your current installation while keeping your files, settings, and most apps. It’s the go-to fix for system corruption, failed updates, or a sluggish OS, and it often resolves issues that other repair tools can’t. Before you start, back up your important data to an external drive, ensure you have a stable internet connection, and note your Windows 10 product key (though it’s usually auto-detected).

What You’ll Need

A Windows 10 PC with at least 10 GB of free disk space (more is better).
An internet connection to download the Media Creation Tool or a Windows 10 ISO.
Your Windows 10 product key (optional; the tool usually detects it).
An external backup drive or cloud storage for your personal files.
Administrator access to your PC.

Step-by-Step

Back up your data. Copy your documents, photos, and any other important files to an external drive or cloud service. While the in-place upgrade preserves files, unexpected issues can occur.
Download the Media Creation Tool. Visit the official Microsoft software download page and download the “Media Creation Tool” for Windows 10. Make sure you download the 64-bit or 32-bit version that matches your system (most are 64-bit).
Run the tool. Right-click the downloaded file and select “Run as administrator.” Accept the license terms when prompted.
Choose “Upgrade this PC now.” On the first screen, select the option that says “Upgrade this PC now” and click “Next.” The tool will then download the necessary files. This may take a while depending on your internet speed.
Wait for the download and preparation. The tool will download Windows 10 and prepare the installation. You’ll see a progress bar. Do not turn off your PC during this phase.
Accept the license terms again. When prompted, read and accept the Microsoft Software License Terms.
Choose what to keep. On the “Ready to install” screen, you’ll see a “Keep personal files and apps” option. Make sure this is selected. If you want to be extra safe, you can click “Change what to keep” and verify that “Keep personal files and apps” is chosen.
Click “Install.” The upgrade will begin. Your PC will restart several times. Leave it alone until it finishes; this can take 30 minutes to a few hours.
Complete the setup. After the final restart, you’ll go through the standard Windows setup (region, keyboard layout, etc.). Sign in with your Microsoft account or local account. Your files and apps should be exactly where you left them.
Check for updates. Once you’re back on the desktop, go to Settings > Update & Security > Windows Update and click “Check for updates.” Install any pending updates to ensure your system is fully patched.

Common Mistakes

Not backing up. Even though the in-place upgrade is designed to preserve files, a power outage or unexpected error could cause data loss. Always back up.
Choosing “Keep nothing.” If you accidentally select “Nothing” on the “What to keep” screen, Windows will erase all your files and apps. Double-check the option before clicking Install.
Running the tool without admin rights. The Media Creation Tool requires administrative privileges. If you don’t run it as administrator, the upgrade may fail.
Interrupting the process. Unplugging your laptop, pressing the power button, or forcing a restart during the upgrade can corrupt your system. Let it run.
Ignoring disk space. If your drive is nearly full, the upgrade may fail. Free up space or use a larger drive.

Tips

Use the ISO method if the tool fails. If the Media Creation Tool errors out, download a Windows 10 ISO from Microsoft, mount it (right-click > Mount), and run setup.exe from inside the mounted drive.
Disable third-party antivirus temporarily. Some security software can interfere with the upgrade. Consider disabling it (or uninstalling) before starting, then re-enable it afterward.
Plug in your laptop. If you’re on a laptop, connect the charger. A dead battery mid-upgrade is a recipe for disaster.
Keep your product key handy. Usually the tool detects your key, but if it asks, you’ll need it. It’s often printed on a sticker on your PC or in your Microsoft account.
Use the “Refresh” option if available. In some versions of Windows, you can go to Settings > Update & Security > Recovery and choose “Get started” under “Reset this PC” – but that’s a different process. Stick to the in-place upgrade for a true repair.

Troubleshooting

The upgrade fails with an error code. Common errors include 0x8007002C, 0x80070057, or 0x800F0922. Try the following:

Run Windows Update to install all pending updates, then try again.
Disable any third-party antivirus or firewall temporarily.
Free up more disk space (aim for at least 20 GB).
Run the Media Creation Tool with internet connection and try again.
If errors persist, download the ISO directly and run setup.exe from it.

The upgrade gets stuck at a certain percentage. Wait at least 30 minutes. If it’s stuck for over an hour, try restarting your PC and running the tool again. Sometimes a reboot clears temporary glitches.

Your files are gone after the upgrade. If you selected “Keep nothing” or something went wrong, check the Windows.old folder on your C: drive. It contains your previous installation’s files. You can browse it to recover data.

The upgrade rolls back automatically. Windows will revert to your previous version if it detects a problem. Check the setup logs in C:\Windows\Panther for details. Often, it’s due to incompatible drivers or software. Uninstall recently added programs and try again.

You’re prompted for a product key. If you’re reinstalling the same edition (Home or Pro) and your PC was previously activated, you can click “I don’t have a product key” and continue. Windows will reactivate automatically based on your hardware.

Frequently Asked Questions

Will an in-place upgrade delete my files?

No, as long as you choose “Keep personal files and apps.” Your documents, photos, and installed programs remain intact. It’s still wise to back up beforehand.

Do I need a product key to do an in-place upgrade?

Usually not. The tool detects your existing Windows license. If it asks, you can skip it and Windows will activate automatically after the upgrade if your PC was previously activated.

Can I do an in-place upgrade from Windows 7 or 8?

Yes, you can upgrade from Windows 7 or 8.1 to Windows 10 using the Media Creation Tool, but that’s a full upgrade, not a repair. The steps are similar, but the “Keep” options may vary. For repair purposes, this guide assumes you’re already on Windows 10.

How long does the in-place upgrade take?

Typically 30 minutes to 2 hours, depending on your hardware and internet speed. The download phase is the most variable part.

Will my installed applications survive?

Yes, if you choose “Keep personal files and apps.” Most applications remain installed and functional. However, some system-level tools or drivers may need to be reinstalled.

Is an in-place upgrade the same as a clean install?

No. A clean install wipes your drive and installs Windows from scratch, removing all files and apps. An in-place upgrade preserves everything while repairing system files.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

More in this bed

The whole Tech How-To bed →