How to Reinstall Windows 10 without CD/USB Easily? (original) (raw)

Last Updated : 23 Jul, 2025

Reinstalling Windows 10 without a CD or USB might sound like a challenge, but it's actually more straightforward than you might think. In many cases, reinstalling the Windows system can help you, like if the PC is not working as normal, the computer is running slower than usual, you are encountering frequent errors, or you simply need a fresh start. Using the built-in recovery tools or cloud services can breathe new life into your system.

In this guide, we'll walk you through the step-by-step process to reinstall Windows 10 without a CD or USB, ensuring that you keep your system clean and will also address some common issues during reinstallation.

Table of Content

Why Reinstall Windows 10?

Reinstalling Windows 10 can be a powerful solution for addressing a variety of issues and improving your computer's performance. Here are some common reasons why you might consider reinstalling the operating system:

**1. Fixing System Errors

Over time, Windows can encounter errors such as missing files, corrupted system components, or software conflicts. Reinstalling Windows can repair these problems by providing a fresh installation.

2. **Improving System Performance

A cluttered system with unnecessary files, outdated drivers, and residual software can slow down your PC. Reinstalling Windows can give your computer a clean slate, resulting in faster performance and improved responsiveness.

3. **Removing Malware or Viruses

If your computer has been infected with persistent malware or viruses that antivirus programs can't fully remove, reinstalling Windows is a sure way to eliminate these threats and ensure your system is secure.

3. **System Errors or Corruption

Windows files can become corrupted due to failed updates, hardware issues, or system crashes. If you’re experiencing frequent crashes or system instability, reinstalling Windows 10 can often resolve these issues by restoring the OS to a clean state.

4. **Recovering from Software Glitches

Issues like frequent crashes, system freezes, or applications not working as expected can often be resolved by reinstalling Windows, as it resets the system to its default state.

How to Reinstall Windows 10 Without CD or USB - 4 Methods

There are specific methods that you can try to reinstall the Windows 10 software version on your PC. The processes can get complex to handle for non-technical users. So, it is best to go through the steps carefully to avoid any errors.

1. **Using the "Reset This PC" Feature

One of the best options for reinstalling Windows 10 without losing any files is to try the Reset This PC feature. This is a preset feature Microsoft included in the Windows 10 software, which users can operate for this process without any key. Also, while using this method, you can choose to remove the files or keep them on the device. Let's break it down in easy steps to perform this method.

**Step 1: Go to **Settings > Update & Security > Recovery

Settings

Windows Update

**Step 2: **Select Reset this PC & click on "**Get Started"

Recovery

**Step 3: **Choose Your Option:

Reset This PC

**Step 4: Follow the on-screen Instructions

Ready to Reset

**2. Reinstall the Windows 10 OS with ISO Files

If your PC is bootable and the size of the internal hard drive is significantly large, users can use this method. You can save the ISO file type into the PC which is later used for making a DVD. There is no need to use a USB drive or CD, but users must download the EasyBCD software. This is a free app that is usable on different PC types. Let's check the detailed steps below:

**Step 1: Visit the Official Site and Download the ISO file

Windows 10 Setup

win-10-setup

win 10 setup

**Step 2: Choose which Media to use

choose-Media

Choose Media

**Step 3: Proceed to Complete the Installation

Proceed

Proceed

**Note: This method requires a valid ISO file and enough free disk space to complete the Windows 10 Installation.

4. **Reinstall Windows using the "WinRE"

Step 1: Access WinRE (Windows Recovery Environment)

winre01

Troubleshoot

**Step 2: Choose Advanced Startup

reset-this-pc0

Reset this PC

Step 3: Follow the Prompts

final0

Ready to Reset

**Note: This method can be accessed even if Windows isn’t booting properly. Just ensure that the PC must be able to reach WinRE.

**4. Using the "System Image Recovery" Tool (Alternative Method)

**Step 1: Launch the third-party tool > Create a backup

backup

Create Backup

**Step 2: Choose Backup File & Prepare your System

backup001

Choose Backup

All of the data in your system OS, type the system files/partitions will get selected automatically. Choose the saving destination location.

**Step 3: Proceed to Start the Backup

Make customization-based settings configurations like activation of the schedule for the automatic backup, like monthly, weekly, daily, or specific events. Then, tap on Backup Now.

backup-now01

Backup Now

**Step 4: Schedule Backup for Future Reference

Go to the destination you selected for the backup and choose the backed-up pbd file. Press OK. Select the recovery disk, keeping the partition style the same as the source disk here. Make disk layout customization as needed and then click on “Back Up Now”.

**Conclusion

Reinstalling Windows 10 without a CD or USB is both convenient and effective, especially when your system is facing performance issues, malware infections, or corruption. With options like **Reset this PC, **WinRE, **System Image Recovery Tool & **ISO file installation, you have multiple ways to restore your system. Remember to back up your files before proceeding and follow the steps carefully to ensure a smooth process.

Whether you're aiming for better performance, removing viruses, or just cleaning up your system, reinstalling Windows 10 is a useful skill that will help extend the life of your PC and improve your user experience.