If you're looking to protect your device with top-tier cybersecurity, Malwarebytes Premium is one of the best tools out there. Whether you've upgraded your PC, reinstalled your operating system, or just need a fresh install, it's important to know how to reinstall Malwarebytes with product key the right way. Many users also ask how to download Malwarebytes with product key after purchasing it—this guide walks you through the entire process.

In this step-by-step tutorial, we’ll cover how to completely reinstall Malwarebytes with product key, where to download Malwarebytes with product key, and how to activate your Premium version so you're up and running quickly. Whether you’re on Windows or Mac, this guide applies to you.

Let’s get started!

Why You Might Need to Reinstall Malwarebytes Premium

There are several reasons you might need to reinstall Malwarebytes with product key:

  • You reformatted your computer or reinstalled Windows/macOS

  • You’re transferring your license to a new device

  • Malwarebytes has become corrupted or isn’t working properly

  • The program won’t open, update, or run scans

  • You're upgrading from a trial to a paid version

Whatever your situation, following the right steps ensures that you not only download Malwarebytes with product key correctly, but also that your license is activated and ready for use.

Step 1: Prepare Your Product Key

Before you begin reinstalling, make sure you have your Malwarebytes product key handy. You’ll need this to activate the Premium version after reinstalling.

How to Find Your Product Key:

  • Email Confirmation: If you bought Malwarebytes online, your key should be in the confirmation email.

  • Malwarebytes Account: Log in at https://my.malwarebytes.com to view your license.

  • Retail Purchase: Check the card or packaging your key came with.

  • Previous Install: If you still have access to the previous installation:

    • Open Malwarebytes

    • Go to Settings > Account

    • Copy your license key

Once you have your key, you’re ready to reinstall Malwarebytes with product key safely.

Step 2: Uninstall Malwarebytes (If Needed)

If Malwarebytes is currently installed but not functioning properly, you should uninstall it completely before reinstalling.

On Windows:

  1. Press Windows + R, type appwiz.cpl, and hit Enter

  2. Find Malwarebytes in the list

  3. Right-click and select Uninstall

  4. Follow the prompts and reboot your computer

On Mac:

  1. Open the Applications folder

  2. Drag Malwarebytes to the Trash

  3. Empty the Trash and restart your Mac

This ensures a clean slate before you download Malwarebytes with product key again.

Step 3: Download Malwarebytes Premium Installer

Now, let’s download Malwarebytes with product key from the official source.

Download Link:

Visit the official site:
https://www.malwarebytes.com

Or go directly to the installer:
https://www.malwarebytes.com/mwb-download

Choose Your OS:

  • Windows: Click the Windows download link

  • Mac: Select the macOS version

Once the installer downloads, double-click it to begin the installation process.

Step 4: Install Malwarebytes on Your Device

With the installer ready, follow the instructions to install Malwarebytes on your system.

On Windows:

  1. Double-click MBSetup.exe

  2. Click Yes when prompted by User Account Control

  3. Choose Personal Use (unless you’re setting it up for work)

  4. Click Install

  5. Wait for installation to complete, then click Finish

On Mac:

  1. Open the .pkg installer file

  2. Follow the prompts to install the application

  3. Grant permissions if asked

  4. Complete the setup wizard

Once done, the application will launch automatically.

Step 5: Activate Malwarebytes Using Product Key

This is the most important step in the process—activating your Premium features using the key you prepared earlier.

How to Activate:

  1. Open Malwarebytes

  2. On the dashboard, click Activate License

  3. Enter your product key

    • If your key has both an ID and Key, click Enter License Key and input both fields

    • If it’s a single key, paste it into the box

  4. Click Activate

You should now see a confirmation that Malwarebytes Premium is activated.

Step 6: Update and Customize Settings

Now that you’ve completed the steps to reinstall Malwarebytes with product key, you should update it and tweak a few settings.

Update Malwarebytes:

  • Go to Settings > General

  • Click Check for Updates

Recommended Settings:

  • Enable Real-Time Protection

  • Set automatic scan schedules

  • Allow Malwarebytes to start with your computer

These features are what make Premium worth it, so make sure they’re turned on.

Step 7: Sign In to Your Malwarebytes Account (Optional)

If you’ve created a Malwarebytes account, you can log in to manage your subscriptions and devices.

Sign In:

  1. Go to https://my.malwarebytes.com

  2. Enter your registered email and password

  3. You’ll be able to:

    • View active devices

    • Transfer your license

    • Deactivate old installations

    • Renew your subscription

This can be helpful if you ever need to reinstall Malwarebytes with product key on a new computer in the future.

Troubleshooting Common Issues

What if My Product Key Doesn’t Work?

  • Make sure there are no typos

  • Confirm you’re entering it in the right format

  • If still failing, contact Malwarebytes Support

Can’t Download Malwarebytes?

  • Disable other antivirus temporarily

  • Check your firewall or network settings

  • Try a different browser or download via safe mode

Program Won’t Open After Install?

  • Reboot your computer

  • Try running it as administrator

  • Redownload and reinstall the program

Transferring Your License to Another Device

Need to install Malwarebytes Premium on a new computer? No problem.

Steps:

  1. Deactivate the license from the old computer:

    • Open Malwarebytes > Settings > Account

    • Click Deactivate

  2. Install Malwarebytes on the new computer (see steps above)

  3. Enter your product key to activate

Each license has a device limit, so make sure you stay within it.

Why Choose Malwarebytes Premium?

After you download Malwarebytes with product key and activate it, you gain access to powerful features:

  • Real-time protection from malware, ransomware, phishing

  • Automatic updates for threat intelligence

  • Scheduled scans and behavior monitoring

  • Lightweight and fast—won’t slow your system down

  • Works alongside other antivirus tools

It’s an investment in peace of mind, especially with the growing number of cyber threats today.

Final Thoughts

Reinstalling antivirus software may sound like a hassle, but it’s simple if you follow the right process. Whether you're upgrading your system, switching devices, or doing a fresh install, knowing how to reinstall Malwarebytes with product key ensures your device stays protected without interruption.

From uninstalling the old version, downloading the installer, and activating with your product key—this complete guide walks you through it all. And now that you’ve successfully downloaded Malwarebytes with product key and reactivated your Premium plan, you can sit back and browse worry-free.

Remember to keep your license key stored safely, update Malwarebytes regularly, and configure your settings for the best protection.

If you have any more questions about Malwarebytes, installation issues, or cybersecurity tips, feel free to reach out or leave a comment!