Filter them out then. Use your Keyword filters. Go to LW's menu bar, Tools>Options>Filters>Keywords & add the words .wmv & .jpg & remember you can add or remove keyword filters anytime so long as you use the Apply button. Also tick the Ignore Adult Content. See sample image: Adding to your Keyword Filter
You might want to add a few more keywords such as slut, teenager, etc.

A full list of terms you can add to the filter to eradicate porn search results: (1) HERE (click on link) (See 1/3 down page under the paragraph called: public void disallowAdult)

Edit: (2) A good list of 'extra' words to add to the keyword filter can be found here Keywords worth adding to your Keyword Filter