Mirage drivers are used for desktop duplication and these drivers are not available in Windows 7 and Windows Server 2008 due to which when you install Leaptest on Windows 7 or Windows Server 2008 you user get this error.
Leaptest automatically detects operating system (Windows 7 and Windows Server 2008) and installs Mirage driver as part of its installation to facilitate screen duplication.
Note: After installation you have to "Reboot your computer manually".
Installed Mirage driver requires the computer to reboot in order to complete the installation, after computer reboot driver will function as per designed and you will be able to capture your screen.
If the issue continues, please contact our Priority Support.