Introducing System Mechanic Ultimate Defense

System Mechanic Ultimate Defense combines seven powerful products in a single System Mechanic dashboard for your convenience. System Mechanic Ultimate Defense is the total package that delivers all your security, privacy, and performance needs in one easy-to-use interface.

System Requirements

The System Mechanic Ultimate Defense program requires a PC with Microsoft® Windows® 10, Windows 8.1, Windows 8, or Windows 7; at least 270 MB of available hard disk space (includes virus definitions); minimum 512 MB RAM (optimal 2 GB); and an internet connection for license activation. Your web browsers must be up-to-date and the latest Windows updates should be fully applied.

Installing System Mechanic Ultimate Defense

  1. System Shield is the antivirus component of System Mechanic Ultimate Defense. To install and run System Shield as your primary real-time antivirus protection, first uninstall any other third-party antivirus software.
  2. Ensure that your internet connection is on and that no firewall or security programs are blocking outgoing access.
  3. Go to Choose a destination folder and click Save.
  4. Open the installation file from either your browser download tray or the folder in which you saved it. If the User Account Control window appears, click Yes.
  5. After the iolo Download Manager finishes, if prompted, click Yes to save a copy of the installation file.
  6. When the installer wizard opens, follow the steps onscreen to complete the installation of System Mechanic Ultimate Defense.
  7. During installation you will be asked to enter the Activation Key provided in your order fulfillment email. Completely type all letters andnumbers, exactly as shown. (Any hyphens will be automatically entered.)
  8. You may be prompted to separately accept the installation of System Shield in order to proceed.
  9. On the last screen of the installation wizard, click Finish. You may be prompted to restart your computer to complete the installation.

Troubleshooting Licensing and Installation

If you have any difficulties with the licensing or installation of System Mechanic Ultimate Defense:

  • Ensure that your computer is connected to the internet and that no firewall, security, or parental control programs are blocking outgoing access.
  • Double-check the values you entered for the Activation Key, making sure that no spaces are entered and that all letters and numbers are entered exactly as shown.
  • Some characters in the Activation Key (such as the number 0 and the letter O) can look very similar. Try double-checking the following: the letters O, l (lower-case L), I (capital i); and the numbers 0 (zero) and 1 (one).
  • Under the terms of iolo’s Whole Home License®, you may install System Mechanic Ultimate Defense on every PC in a single-family household for personal, non-commercial use only. For full terms and conditions, please see

Getting Started

If System Mechanic Ultimate Defense does not automatically launch immediately after installing, double-click the System Mechanic Ultimate Defense icon on your desktop. Once opened, System Mechanic Ultimate Defense displays the Dashboard, which provides access to all of the software products in the program.

System Mechanic Ultimate Defense Includes the Full Versions of:

  • System Mechanic® performance optimization
  • System Shield® real-time antivirus protection
  • Malware Killer on-demand malware removal
  • Privacy Guardian online privacy protection
  • ByePass secure password manager (now also available for Android devices)
  • DriveScrubber® drive wiping technology
  • Search and Recover deleted file recovery

We suggest that you begin by running an analysis of your computer.

To run an analysis

  1. Be sure the System Mechanic (far left) top icon is selected.
  2. From the System Mechanic Dashboard’s Overview pane, click Analyze Now.
  3. Once the analysis completes, you will see a snapshot of your PC’s condition and see if any problems are detected.

To quickly make repairs, simply click Repair selected.

Getting Help

The integrated Help system provides how-to instructions and detailed information about each feature.

To access the Help

  • On the red menu bar, click the icon. From the dropdown menu, click Get Help Online.

Finding Additional Information

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What is iolo's Whole Home License?

The Whole Home License® is iolo’s licensing policy that allows you to install and keep your software running on all of your compatible devices within the same home. Previously, users were allowed to install and license their iolo software simultaneously on a maximum of three PCs. Under the Whole Home License, a single activation key allows you to use your iolo software on all of your PCs, other than any PCs you use for business purposes. What you need to know about Whole Home Licensing

  • You, your spouse, and your relatives living within the same household may use the same license on any number of PCs that you own which are not used for business.
  • For full legal terms and conditions, see

To install your iolo product on additional PCs:

  1. On the additional computer, download the latest version of your iolo product. Choose from the list of downloads offered here.
  2. Follow the steps in the installation wizard, and enter the same Activation Key that you used to install on your original computer.

You can view the Activation Key on the original computer from within System Mechanic > red menu bar > key icon > Activation Key.