When a Windows PC starts behaving unpredictably—slow performance, random errors, or failed updates—it can quickly become frustrating. The usual advice is to reinstall Windows, but many users worry about losing their files, installed applications, and system settings.

Fortunately, Windows 11 25H2 provides several built-in ways to repair or reinstall the operating system without deleting your personal files. Whether you want to fix system corruption, resolve update problems, or refresh your PC, there are safe methods that preserve your data.

This guide explains the three most reliable ways to reset or reinstall Windows 11 while keeping your files, including performing a repair install, resetting Windows from Settings, and using recovery mode.

Method 1: Reinstall Windows 11 Without Losing Apps and Files (Repair Install)

A repair install, also called an in-place upgrade, reinstalls Windows over your existing installation. This method keeps:

• Installed applications
• Personal files
• System settings

It’s one of the best ways to fix serious Windows problems without starting from scratch.

Step 1: Download the Windows 11 ISO File

• Visit the official Microsoft Windows 11 download page.
• Scroll to Download Windows 11 Disk Image (ISO).
• Select Windows 11 (multi-edition ISO) from the list.

• Click Download.

Step 2: Choose Language and Download

• Select your preferred system language.

• Click Confirm.
• Press 64-bit Download.

The ISO file will begin downloading. This file contains the complete Windows installation.

If downloading the ISO fails, you can instead use the Media Creation Tool, which can also create a bootable USB drive.

Step 3: Mount the ISO File

1- Find the downloaded Windows 11 ISO file on your computer (for example: Win11_25H2_English_x64.iso).

2- Right-click the ISO file and select “Mount”, or simply double-click the file. Windows will create a virtual drive containing the installation files.

3- If the “Open File – Security Warning” appears, click Open to continue.

4- Launch File Explorer and navigate to This PC, where you will see the newly mounted virtual DVD drive containing the Windows installation files.

5- Inside the mounted drive, double-click setup.exe to start the Windows 11 installation process. If a User Account Control (UAC) prompt appears, click Yes.

6- When the Windows 11 Setup window appears, click “Change how Setup downloads updates.”

7- Decide whether you want Windows Setup to download updates during installation.

8- You can select “Not right now” to skip updates at this stage.
Optionally uncheck “I want to help make the installation better”, then click Next.

9- Read the Microsoft Software License Terms, then click Accept to continue.

10- On the “Choose what to keep” screen, select “Keep personal files and apps.”
This option ensures that all your applications, settings, and personal files remain intact after the

11- Windows Setup will now verify that your system is ready for installation. Wait until the check is completed.

12- Click Install to begin reinstalling Windows 11. Your PC will restart several times during the process.

Once the installation is complete, your Windows 11 will be refreshed without losing any apps, settings, or personal files.

Method 2: Reset Windows 11 from Settings (Keep Files)

If your system problems persist, Windows includes a Reset this PC feature that reinstalls the OS while keeping your personal files.

However, installed applications will be removed, so you may need to reinstall some software afterward.

Step 1: Open Windows Settings

Press:

• Windows + I
• to open the Settings app.

Step 2: Open Recovery Options

1. Select System in the left menu.
2. Scroll down and click Recovery.

Step 3: Start the Reset Process

Under Recovery options, click:

• Reset PC

• next to Reset this PC.

Step 4: Choose “Keep My Files”

In the reset window, select:

• Keep my files

This removes installed programs and settings but preserves your personal documents, photos, and other data.

Step 5: Choose Reinstallation Method

You’ll now select how Windows should reinstall itself.

Cloud Download

• Downloads the latest Windows version from Microsoft
• Requires internet
• Uses about 5 GB of data

Local Reinstall

• Uses existing files stored on your PC
• Faster
• May not fix corrupted system files

Step 6: Confirm Settings

• Review the reset options and click Next.

If your PC recently installed updates, you may see a warning that resetting will remove them.

Step 7: Review Removed Apps

 1- If you recently installed Windows updates, you may see a warning stating that resetting your PC will remove the latest updates. Click Next to proceed.

2- Click “View apps that will be removed” to see a list of applications that will be uninstalled during the reset process. Make note of any important programs you may need to reinstall later.

3- After reviewing the list, click Back to return to the reset confirmation screen.

4- Click Reset to begin resetting your PC. Your computer will restart and the process may take several minutes to complete.

5- Once the reset is finished, your PC will reboot and Windows 11 will be freshly reinstalled.
Your personal files will remain intact, but you will need to reinstall any applications that were removed during the reset.

Method 3: Reset Windows Using Recovery Mode (WinRE)

If you cannot access Windows or the Settings app, you can still reset your PC using the Windows Recovery Environment (WinRE).

Step 1: Enter Recovery Mode

From the login screen:

1. Click the Power icon in the lower-right corner.
2. Hold the Shift key.
3. Click Restart.

Your computer will boot into recovery mode.

Step 2: Open Troubleshoot Options

Inside the recovery environment:

1- Select Troubleshoot.

2- Click Reset this PC.

Step 3: Keep Personal Files

Choose:

• Keep my files

This preserves documents and other personal data.

Step 4: Select Installation Method

You’ll again choose between:

• Cloud download
• Local reinstall

Step 5: Start the Reset

Click Reset.

Windows will begin reinstalling automatically.

Once finished, your PC will boot into a fresh Windows 11 installation while keeping your files.

Which Method Should You Use?

Here’s a quick comparison to help you decide:

For most users, the repair install method is the safest option, because it preserves both files and applications.

Conclusion

System issues don’t always require a complete wipe of your computer. In Windows 11 25H2, you can repair or refresh the operating system while keeping your important files safe.

Whether you perform a repair install using the Windows ISO, reset the PC from Settings, or use Recovery Mode, these tools allow you to fix many common problems without losing your data.

By choosing the right method for your situation, you can quickly restore your PC’s performance and get Windows running smoothly again—without the hassle of rebuilding everything from scratch.