When installing System Mechanic Ultimate Defense with a similar product installed, customers may receive a popup window stating that you must first uninstall PRODUCT X before you can install System Mechanic Ultimate Defense. For example, installing more than one antivirus solution has the potential to cause system conflicts and/or sluggishness. 

We recommend uninstalling other optimization or antivirus products and disabling Windows Defender before installing the full performance, protection and privacy suite System Mechanic Ultimate Defense.

To learn more about System Mechanic Ultimate Defense, please visit our product page here.