When the Installer starts, follow its step-by-step instructions until you see a windows that asks for your License Information.
Carefully type the Activation key and your email address into the License Information window. Click OK.
Continue following the step-by-step instructions to complete the installation process.When you are finished, you may need to restart your PC.
If System Mechanic does not start immediately after activation, restart the computer and when Windows loads up double-click this desktop icon
Once System Mechanic has obtained and applied all critical updates, perform a System Analysis by clicking Analyze Now.
You may find this video recording useful https://www.youtube.com/watch?v=HBkPR06Vwlw