Ugh, something has happened to your settings....
Make sure that you only have a single version of MPC-HC installed. CCCP installs one that is preconfigured though if you are using that one at the moment, some (many) settings have been flipped.. (Start-> Programs-> Combined Community Codec Pack)
In MPC-HC: View-> Options-> Internal Filters. Right click the left column and click Disable all filters. Right click the right column and click Disable all filters.
Under View-> Options-> Output, set the video renderer to "EVR".
On the first page of the CCCP Settings application, make sure that LAV Video is ticked.
After doing that, please tell me what items are listed in the Play-> Filters menu.