I have Word 2010 on a 64 bit ASUS computer.
I want to search for a word or phrase using windows explorer across all file formats PDF, Excel, PowerPoint.
It will only return Word Docs that have the word and not a PDF even though I know it is in a PDF that has no security.
I did this previously but now there seems to be a problem.
Is there a preference that needs to be turned on?
Any help would be much appreciated.

I went into windows explorer and then Tools - folder options - search


Then under what to search clicked on "Always search file names......
But that doesn't search the pdfs