The System Mechanic family of products, DriveScrubber, Malware Killer, Search and Recover, System Shield, Privacy Guardian and ByePass use the System Mechanic Ultimate Defense framework, using a single installation file which is the base product of System Mechanic Ultimate Defense.

If you have purchased System Mechanic Ultimate Defense, System Shield is already included. 

If you have only purchased System Shield, the installation may start out as System Mechanic Ultimate Defense, but once the System Shield activation key is entered, the software will activate accordingly as System Shield.

To install your product:

  1. Download the product installation file from

  2. Navigate to your Downloads folder and double-click on the SystemMechanicUltimateDefense_DM.exe file and follow the installation prompts.

  3. When the product starts, enter your email address (if prompted) and select Begin activation.

  4. Enter your product key and select Finish activation. Your product is ready for use.



Need assistance?

If you would like assistance from one of our knowledgeable Customer Care Representatives, please call our affordable 24/7 LiveTech Support at (801) 857-2345. You can also access self-help online by visitng our Customer Care Portal.