How to Install Malwarebytes in the USA — Step-by-Step Guide 2026

What this guide covers

Before you install
Verified & tested
Step-by-step installation
Video tutorial
Errors & solutions
How to set up after install
Malwarebytes vs Defender
FAQ

Before You Start

Installing Malwarebytes Free — What to Know First

Installing Malwarebytes is one of the fastest ways to add serious virus protection (защита от вирусов) to a PC, Mac or phone. The Malwarebytes Free edition gives you full on-demand system scanning (сканирование системы) at no cost, while the 14-day Malwarebytes Premium trial that starts on first launch adds always-on real-time protection. This guide walks you through the entire journey: download → install → first scan → setup → fixing errors → daily use.

A few things worth knowing before you begin the Malwarebytes setup:

It is genuinely free. The installer never asks for payment to remove a threat it finds.
Download only from the official source. Always get the installer from the official Malwarebytes website at malwarebytes.com (every download button on this page links there) to avoid fake or repackaged installers.
It runs beside Windows Defender. You do not need to remove your existing antivirus.
Requirements: Windows 11 / 10 (64-bit), 2 GB RAM, ~250 MB free disk space.

✅

Verified and tested on Windows 11

Every step below was performed on a clean Windows 11 (64-bit) machine using the official Malwarebytes installer (MBSetup, version 5.3) downloaded from malwarebytes.com. Install completed in under two minutes with no restart. Guide last reviewed and updated May 2026. Malwarebytes is a product of Malwarebytes Inc.; this is an independent installation guide and download portal.

Installation Guide

Step-by-Step: How to Install Malwarebytes

Choose your platform. The Windows 11 walkthrough includes a screenshot at each stage.

1

Download the Malwarebytes installer

Click the button to download the official installer (MBSetup.exe, about 3.5 MB) from Malwarebytes servers. Save it to your Downloads folder. This is the same Malwarebytes free download used for the Windows 11 setup.

⬇ Download for Windows

Downloading the Malwarebytes free installer for Windows 11 from the official site — Step 1 — download MBSetup.exe from the official Malwarebytes source.

2

Approve the Windows SmartScreen prompt

Windows 11 may show "Windows protected your PC." This generic SmartScreen warning appears for any newly released software — it does not mean the file is unsafe.

Click More info, then Run anyway. If your existing antivirus blocks it, pause that antivirus during installation.

💡 The installer is digitally signed by Malwarebytes Inc.. Verify it via right-click MBSetup.exe → Properties → Digital Signatures.

3

Run the setup wizard

Double-click MBSetup.exe and click Install. There are no components or folders to choose — the Malwarebytes setup installs everything automatically. When asked, pick Me or my family for personal use.

Malwarebytes dashboard on Windows 11 immediately after the setup wizard finishes installing — Step 3 — the Malwarebytes dashboard opens automatically when setup finishes.

4

Run your first system scan

Click Scan on the dashboard. A Threat Scan checks memory, startup items, the registry and common infection points — a full system scan (сканирование системы) typically takes 3–10 minutes. Review the results and click Quarantine to remove everything found.

Malwarebytes Threat Scan results on Windows 11 listing detected items ready to move to quarantine — Step 4 — detected threats are moved to the secure Quarantine vault.

✓ Your first scan starts a free 14-day Malwarebytes Premium trial with real-time protection — no credit card needed.

5

Confirm real-time protection is on

On the dashboard, check that Real-Time Protection shows as active. During the trial it is on by default, continuously blocking malware, ransomware and malicious websites before they can run. That is the difference between cleaning an infection and preventing one.

1

Download the Mac installer

Download the Malwarebytes for Mac package (.pkg) from the official site — it is distributed directly by Malwarebytes, not the App Store.

⬇ Download for Mac

2

Open and allow the installer

Double-click the .pkg. If macOS says "unidentified developer," open System Settings → Privacy & Security and click Open Anyway next to Malwarebytes.

3

Grant the system extension

Approve the Malwarebytes system extension when prompted so it can scan and protect macOS at the system level.

4

Scan and quarantine

Open Malwarebytes from Applications, click Scan, then Quarantine any adware, trojans or PUPs found.

1

Install from Google Play

Open the Google Play Store, search Malwarebytes, and install the official app by Malwarebytes Inc..

⬇ Get on Google Play

2

Grant permissions

Allow Storage (to scan files) and Phone (for Scam Guard). Permissions are optional but expand protection.

3

Scan & enable protection

Tap Run a Scan, then turn on Real-time Protection in the dashboard.

1

Install from the App Store

Search Malwarebytes Mobile Security on the App Store and install it.

⬇ Get on App Store

2

Enable Scam Guard

In Settings → Phone → Call Blocking & Identification, enable Malwarebytes to flag scam calls.

3

Add the Safari extension

In Settings → Safari → Extensions, enable Malwarebytes to block malicious sites and ads.

Watch & Follow

Malwarebytes Installation Video Tutorial

Prefer to watch? This short video walks through the full Malwarebytes setup on Windows 11 — from download to first scan and real-time protection.

Video tutorial: installing Malwarebytes free and running your first system scan on Windows 11.

Troubleshooting

Malwarebytes Install Errors & Solutions

Real, commonly reported problems during a Malwarebytes installation failed scenario — and exactly how to fix each one.

"Windows protected your PC" (SmartScreen) Common

A blue SmartScreen dialog blocks the installer because the file is newly released, not because it is unsafe.

Fix: Click More info → Run anyway. The file is signed by Malwarebytes Inc.; confirm via right-click → Properties → Digital Signatures.

Installer freezes or hangs at "Installing" Common

MBSetup appears stuck and never completes.

Fix: Close other apps, pause any existing antivirus, right-click MBSetup.exe → Run as administrator, ensure 2 GB+ free disk space, and re-download a fresh installer if the file may be corrupt.

"Unable to connect to the service" Startup

Malwarebytes installs but shows a service error when it launches.

Fix: Restart the PC. If it persists, run the free Malwarebytes Support Tool to repair the install, then reboot — this re-registers the MBAMService background service.

Error code 1603 — fatal install error Windows

A generic Windows Installer failure, usually from leftover files of a previous Malwarebytes version.

Fix: Run the Malwarebytes Support Tool and choose Clean (full removal), reboot, then install a fresh copy of MBSetup.exe.

Real-time protection won't turn on Post-install

The toggle flips back off, often due to a conflict with another active antivirus.

Fix: Make sure only one product manages real-time protection, reboot, and re-enable the toggle. On Windows 11, register Malwarebytes in Windows Security so the two coordinate.

Malwarebytes won't open after installing Post-install

The app installs but the window never appears.

Fix: Reboot first. If it still fails, repair (or fully uninstall and reinstall) using the Malwarebytes Support Tool. A corrupted download or a conflicting security product is the usual cause.

After Installation

How to Set Up Malwarebytes After Installing

Five quick settings that turn a fresh install into complete, set-and-forget protection.

1. Turn on real-time protection

Confirm Real-Time Protection is active on the dashboard. This is the always-on layer that blocks threats the moment they appear, rather than only when you scan.

2. Schedule automatic scans

In Settings → Scan Schedule, add a weekly Threat Scan so system scanning happens automatically even if you forget.

3. Install the Browser Guard plugin

Add the free Browser Guard plugin (extension) for Chrome, Edge, Firefox or Safari to block scam sites, ads and trackers right inside your browser.

4. Review the Quarantine vault

Open Detection History to see items in the Quarantine vault. Restore anything flagged by mistake, or permanently delete confirmed threats after a few days.

5. Keep a record of detections

You can export a scan log and paste the summary into a notes app or a markdown file, which is handy for tracking repeat infections or sharing with support.

6. Decide: Free or Premium

When the 14-day trial ends, choose Malwarebytes Free (manual scanner) or keep Malwarebytes Premium for ongoing real-time protection across up to 5 devices.

Comparison

Malwarebytes vs Windows Defender

Both are good — and they are designed to run together. Here is how they compare for everyday home protection.

Capability	Windows Defender	Malwarebytes Premium
Built into Windows 11	Yes	Add-on install
Real-time protection	Yes	Yes
Behaviour-based zero-day detection	Basic	Advanced
Dedicated anti-ransomware	Limited	Yes
Browser plugin (scam & ad blocking)	No	Browser Guard
PUP / adware removal	Limited	Aggressive
Phone scam detection (mobile)	No	Scam Guard
Runs alongside the other	Yes	Yes
Price	Free	Free + paid Premium

Recommended setup: keep Windows Defender as the baseline and add Malwarebytes for stronger behaviour-based detection and web protection. See the full feature breakdown →

In Depth

Everything Else You Need to Know About Installing Malwarebytes

What actually happens during a Malwarebytes install

When you run MBSetup.exe, the installer downloads the latest program package and threat-definition database, registers a background service called MBAMService, and creates the program folder under C:\Program Files\Malwarebytes. On Windows 11 it also registers with Windows Security so the operating system knows protection is present. None of this requires choices from you — the Malwarebytes setup is deliberately one-click. The whole process is why the install finishes in roughly two minutes and needs no restart.

Because the installer pulls the newest files at install time, you are always protected by current definitions from the first scan, rather than an outdated snapshot bundled months earlier. This is also why an internet connection is recommended during installation, even though on-demand scanning later works offline using the locally stored signatures.

Malwarebytes Free vs Malwarebytes Premium after the trial

Every install begins with a 14-day Malwarebytes Premium trial. When it ends you make a simple choice. Malwarebytes Free stays installed forever as an on-demand scanner: you open it, run a system scan, and it removes whatever it finds at no cost. It is ideal as a second-opinion tool next to Windows Defender, or for cleaning up a one-time infection.

Premium keeps the always-on layers active: real-time protection that blocks threats on contact, dedicated anti-ransomware that stops file encryption in progress, the Browser Guard plugin at full strength, and Scam Guard on mobile. If you bank, shop, work or game online every day — or look after family devices — that prevention layer is usually worth keeping. A single Premium subscription protects up to five devices across Windows, Mac, Android and iOS, and is backed by a 60-day money-back guarantee.

Staying safe: only install from the official source

The single most important safety rule is where you download from. Fake "Malwarebytes" installers circulate on third-party download portals and search ads, and some bundle the very malware you are trying to remove. The genuine installer is digitally signed by Malwarebytes Inc. and is available from the official Malwarebytes website at malwarebytes.com. Every download button on this page points to that official source. If an installer ever demands payment to remove a threat it just found, it is not the real Malwarebytes — close it immediately.

Good habits after your first scan

A few simple routines keep your protection strong over time:

Run a weekly Threat Scan, or schedule one to run automatically.
Leave automatic updates enabled so definitions stay current.
Install the Browser Guard plugin in every browser you use.
Check the Quarantine vault occasionally and clear confirmed threats.
Keep regular backups — no antivirus replaces a good backup against ransomware.

Follow those and Malwarebytes becomes genuinely set-and-forget. You have now covered the full journey: download, install, first system scan, setup, fixing errors, and daily use — everything needed to go from an unprotected PC to complete, ongoing virus protection on Windows 11.

FAQ

How to Install Malwarebytes — FAQ

Is Malwarebytes free to install?

Yes. Malwarebytes Free is completely free to download and install on Windows 11, Windows 10, Mac, Android and iOS. The install begins a 14-day Malwarebytes Premium trial with real-time protection; after 14 days it reverts to the free on-demand scanner, which never expires.

Why does Windows Defender or SmartScreen block the Malwarebytes installer?

Windows SmartScreen flags newly released installers it has not yet cached, regardless of safety. Malwarebytes setup is digitally signed by Malwarebytes Inc. Click "More info" then "Run anyway" to continue. You can verify the signature via right-click MBSetup.exe -> Properties -> Digital Signatures.

How long does Malwarebytes take to install on Windows 11?

Malwarebytes installs in about 1-2 minutes on Windows 11 and no restart is required. The setup wizard has only two choices: click Install, then select personal or business use.

What do I do if Malwarebytes installation failed?

If Malwarebytes installation failed, close other apps, pause any existing antivirus, right-click MBSetup.exe and choose Run as administrator, ensure 2 GB of free disk space, and download a fresh installer in case the file was corrupted. For error code 1603 or leftover files from a previous version, run the free Malwarebytes Support Tool to clean up, then reinstall.

Can I install Malwarebytes without administrator rights?

No. Malwarebytes needs administrator rights because it installs system-level protection services. On a managed work computer, ask your IT administrator to install it; afterwards a standard user account stays protected.

Does Malwarebytes work alongside Windows Defender?

Yes. Malwarebytes is designed to run beside Windows Defender without conflicts. Many users keep Defender as the primary antivirus and add Malwarebytes for stronger behaviour-based detection and web protection.

Where do quarantined threats go after removal?

Removed items are moved to the Quarantine vault, a secure isolated store where files cannot run. From Detection History you can permanently delete items from the vault or restore a false positive. Keeping items quarantined for a few days before deleting is a safe habit.

Does Malwarebytes use browser plugins?

Yes. Besides the desktop app, Malwarebytes offers Browser Guard, a free plugin for Chrome, Edge, Firefox and Safari that blocks scam sites, ads and trackers. Install only the official Browser Guard extension; Malwarebytes does not support arbitrary third-party plugins.

How do I set up real-time protection after installing?

Open Malwarebytes, go to the dashboard and confirm Real-Time Protection is toggled on (it is active automatically during the Premium trial). This continuously blocks malware, ransomware and malicious sites before they can run.

What are the system requirements for Malwarebytes on Windows 11?

Windows 11 or Windows 10 (64-bit), 2 GB RAM and about 250 MB of free disk space. An internet connection is recommended for real-time protection and live updates.

Keep Reading

Related Malwarebytes Guides

⬇ All DownloadsSystem requirements per platform 🛡 Features & Free vs PremiumWhat each version includes 🔴 Errors & FixesInstall & startup troubleshooting 🏠 HomeDownload Malwarebytes free

Ready to Install Malwarebytes?

Download the free installer and be protected on Windows 11 in under 3 minutes.

⬇ Download for Windows Mac