In some scenarios it may be necessary to make adjustments to a windows computers filters (codecs).

Below is the most common tweak we make after installing the Combined Community Codec pack 

If you haven't already installed the CCCP you can follow the instructions in this link


Step 1

Download the attached Windows 7 Filter Tweaker

Step 2

Launch on the affected PC

Step 3

Click "preferred decoders"

Step 4

On the left hand side of the screen under "32-bit decoders" change H.264 from "Microsoft" to "LAV Video".