If you want a fresh start or need to fix persistent system issues, reinstalling Windows is one of the most effective solutions.

This guide covers how to reinstall Windows with or without a USB, along with a few important things to do beforehand so you do not run into avoidable issues.

Before You Begin

Back up your data

This step is optional, but strongly recommended.

If you want to keep important files, back them up before starting by using:

  • An external drive such as a USB, HDD, or SSD

  • Cloud storage such as Google Drive or OneDrive

If you do not back up your data, Windows may still keep your previous installation in a Windows.old folder after reinstalling, but you should not rely on that as a backup.

Make sure Windows is activated

After reinstalling, Windows needs to be activated again.

In most cases, activation will happen automatically once you connect to the internet.

To check which version of Windows you are currently using:

  1. Open Start

  2. Go to Settings

  3. Select System

  4. Open About

  5. Look under Windows specifications

Make sure you reinstall the same edition tied to your license, such as Home or Pro.

Downloading Windows

To reinstall Windows, you will need a Windows ISO file.

Recommended sources:

  • UUPDump (preferred)

  • OS.click

UUPDump is recommended because it allows you to:

  • Choose your Windows version

  • Include the latest updates

  • Include .NET Framework 3.5

This can save time after installation.

Important: Download Network Drivers First

Before reinstalling Windows, make sure you download your network drivers first.

After installation, your internet may not work until the correct network drivers are installed.

To avoid getting stuck offline:

  1. Go to your motherboard or laptop manufacturer’s website

  2. Download your network drivers

  3. Save them to a USB drive or external storage device

If you skip this step, you may not be able to get online after reinstalling Windows.

Reinstall Windows Without a USB

Steps

  1. Disconnect any Ethernet cables

  2. Right-click your Windows ISO file and select Open with File Explorer

  3. Note the drive letter shown, for example D:

  4. Press Windows + R

  5. Type the following:

D:\sources\setup.exe

  1. Click OK

  2. Accept the User Account Control prompt

If you see an error related to temporary files, disable BitLocker and try again.

Setup options

During setup:

  • Select No when asked about updates

  • Uncheck Help make Windows better

  • If prompted for a product key, choose I don’t have a product key

  • Select the Windows edition that matches your license

  • Choose Install Windows only (Advanced)

  • Select your current Windows drive

  • Confirm creation of the Windows.old folder if prompted

Once that is done, let the installation complete.

Reinstall Windows Using a USB

Requirements

  • USB drive with at least 8GB of storage

  • Active internet connection

Steps

  1. Download the Windows Media Creation Tool

    • Windows 10

    • Windows 11

  2. Open the tool and accept the terms

  3. Select Create installation media

  4. Choose your:

    • Language

    • Edition

    • 64-bit architecture

  5. Select USB flash drive

  6. Wait for the tool to finish creating the installer

Bypass Windows 11 Requirements

If your system does not meet Windows 11 installation requirements, you can bypass them during setup.

Steps

  1. Press Shift + F10

  2. Type:

regedit

  1. Navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\Setup\LabConfig

  1. Add the following DWORD values and set each to 1:

BypassTPMCheck
BypassRAMCheck
BypassSecureBootCheck

  1. Restart setup afterward

Choose Your Installation Type

During installation, Windows will ask what you want to keep.

You can choose from:

  • Keep personal files and apps

  • Keep personal files only

  • Keep nothing for a full clean install

Select the option that fits your goal, then continue with installation.

OOBE Setup on First Boot

Windows 11 internet bypass

If Windows 11 forces an internet connection during first boot setup, you can bypass it.

  1. Press Shift + F10

  2. Run:

oobe\BypassNRO.cmd

This allows setup to continue without internet access.

After Installation

Step 1: Disable Windows driver updates

Run the provided registry file to stop Windows from automatically installing drivers.

Restart your PC after applying it.

Step 2: Install drivers manually

Install your drivers in this order:

1. Network drivers

Install the network drivers you downloaded earlier from your motherboard or laptop manufacturer.

2. GPU drivers

Download the latest graphics driver for your GPU:

  • Intel

  • AMD

  • NVIDIA

Optional: Snappy Driver Installer Origin

You can use Snappy Driver Installer Origin (SDIO) if needed, but only with caution.

Recommended usage:

  • Download indexes only

  • Install only the specific drivers you need

  • Do not mass-install everything

Important Notes

A clean Windows install can help:

  • Improve performance

  • Fix system issues

  • Reduce background bloat

  • Improve gaming performance and stability

Once setup is complete, you can move on to any additional optimizations you want to apply.

Need Help?

If you run into any issues with the backup process, contact our support team at support@exmtweaks.com and we'll be happy to assist.