1. Download & Install Bitdefender IS/TS / Windows 8 Security, obviously...

2. Register Mybitdefender account

3. Boot into safe mode and use the trial reset to install the auto-reset function or to use the manual reset.

4. For autoreset: Restart/Shutdown Windows to reset the trial date. If you are using Windows 8 with UEFI bios, then you have to restart everytime you want to reset the trial date.

5. Enjoy!