This part is optional but recommended. Whether you use Reclock or not AutoFrequency can be really useful.
The drawback when you don't use Reclock is that it is necessary that the frequency of your TV be the same (or multiple) of the video. This requires knowing in advance the frequency of the video and to make the necessary adjustments to the HTPC and the TV. And if you use Reclock you must configure your TV to 24hz, for example.
But now thanks to AutoFrequency this is no longer necessary.
Indeed AutoFrequency allows you at the opening of a video to automatically change the frequency of your screen depending on the video, to launch MPC-HC and play the video. When you close the player AutoFrequency switch back to your usual frequency. No manipulation is required everything is automatic !
Unpack the archive of Autofrequency. Double click on the installer and and let everything by default.