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 Complete step-by-step guide to format and reinstall Windows 11 safely and efficiently — written in a clear, professional, and easy-to-follow way:

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🧩 Step 1: Backup Your Important Data

Before formatting, back up all your important files.

• Copy files from Desktop, Documents, Downloads, and Pictures to an external hard drive, pen drive, or cloud storage (Google Drive, OneDrive, etc.).

• If you use a Microsoft account, some files and settings will sync automatically.

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⚙️ Step 2: Create a Bootable Windows 11 USB Drive

🔹 Option 1: Using Microsoft’s Official Tool

1. Go to the official Microsoft website:
   👉 https://www.microsoft.com/software-download/windows11

2. Under “Create Windows 11 Installation Media,” click Download Now.

3. Run the downloaded tool.

4. Choose USB Flash Drive (needs at least 8 GB).

5. It will automatically create a bootable USB for Windows 11.

🔹 Option 2: Using Rufus Software

1. Download the Windows 11 ISO file from Microsoft’s site.

2. Install Rufus (a free tool).

3. Plug in your USB drive → Open Rufus → Select the ISO file.

4. Under “Partition scheme,” choose GPT (for UEFI BIOS).

5. Click Start to create your bootable USB.

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🧰 Step 3: Set Boot Order in BIOS

1. Restart your computer and open BIOS/UEFI (usually by pressing F2, F12, Delete, or Esc during startup).

2. Go to the Boot Priority section.

3. Set your USB Drive as the first boot option.

4. Save changes and exit BIOS.

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💻 Step 4: Install Windows 11

1. Your PC will now boot from the USB.

2. Choose Language, Time, and Keyboard Layout, then click Next.

3. Click Install Now.

4. If it asks for a product key, click “I don’t have a product key” (you can activate later).

5. Choose “Custom: Install Windows only (advanced)”.

6. You’ll see your disk partitions:

   • Select your System (C:) Drive → Click Delete → Choose Unallocated Space → Click Next.

   • ⚠️ This will erase everything from that drive.

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⏳ Step 5: Installation and Setup

• Windows will now install (usually takes 10–30 minutes).

• Your PC will restart a few times.

• After installation, follow the setup: choose region, network, Microsoft account, and preferences.

• Windows will automatically install basic drivers and updates.

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✅ Step 6: Activation and Driver Updates

• Go to Settings → System → Activation → enter your product key if available.

• Open Windows Update and install all available updates and drivers.

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💡 Pro Tips

• Keep Windows Defender and Windows Security ON.

• Install software only from official sources.

• Create a Restore Point after setup.

• Enable TPM 2.0 and Secure Boot in BIOS for better security and performance.