- Right click on "BlockHosts.bat" file and click "Run as administrator" - Uninstall previous installation completely. Install this package from scratch. - Execute 1.Full Setup.exe and install it normally (don't run after installation, just press the close button at top-right corner) - Close YouCam from tray and CyberLink YouCam service from task manager. - Install 2.Full Upgrade Setup to v9.1.1927.0.exe (don't run after installation either) - Close YouCam from tray and CyberLink YouCam service from task manager. - Merge the provided reg file for your system architecture. - Reboot. Important Note: * This will only work with the provided installations, not on the installations from homesite!