[Looking 4 Help Please]

I have the capability to to open resumes that have been submitted by
potential future employees so that I can assign them to the correct
department manager. Just recently I've started having a problem in that some
of the resumes, after I launch them, I get a Convert File text window. I've
tried every option in this list but I either get an error and nothing opens
up or I get the boxes and other strange characters.

I believe that the ones that I'm having problems with most likely were
created in something other than Word, such as Works, Wordpad, Notepad, etc.

I have verified that the document does have an extension of .doc

Here's what I've done in an attempt to resolve issue:
1)installed the 2007 fileformatconverter.exe file
2)Performed steps to unregister the mswrd632 converter [basically deleted
the registry setting]
3)installed a pdf application and tried to convert the doc file to a pdf
4)saved the document as a .docx
5)deleted the registry setting for msword6.wpc

I really need to be able to pull up all resumes, regardless of what
application the person created it in. Thanks in advance for your thoughts.