Is CyanogenMod Installer compatible with my Note 2 after updating it to Android 4.3? Can I install CyanogenMod on Samsung Galaxy Note 2 after I updated it to Android 4.3? Will knox interfere? How can install it using the installer of CyanogenMod or with the conventional way?
Some people have successfully installed CyanogenMod on top of 4.3 (with Knox).

Refer to the official installation guide, which includes installation on the phone and on the PC.