Win8 and 2012 enforces installation of WHQL certified drivers.
Please install only WHQL certified drivers provided by Tehuti.
For trying non certified drivers, please set the machine to “Test Mode” by running the below commands “As Administrator”:
bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS
bcdedit -set TESTSIGNING ON
And Reboot. Verify “Test Mode” is shown on the lower right corner of the Desktop.