[How To] Activate Windows 8 Release Preview (Permanent Trial)

On Start Screen, type cmd (Command Prompt). Now right-click Command Prompt tile, and select Run as administrator to launch CMD utility with administrative privileges. Type following commands:

slmgr /ato
slmgr /dlv

Download this batch script file to disabling its activation mechanism, to achieve the purpose of the permanent trial. I don't know someone had made this script and its work. You must run it as administrator privilege by right-click it > Run as administrator. Press E to perform permanent trial.

Activate_Windows8.bat

If you find out a warning 'PC Settings - Windows has not activated' appear everytime you logon into Windows 8, you have to use this batch script over again.