Windows cannot find file path\file name when opening from Windows Explorer

I realize there are many posts on this issue. When I click a Word 2007 document in Windows Explorer, I get the message "Windows cannot open the file (path\name) make sure...etc." Word opens but file does not. With Word open, clicking brings up another instance of Word (without file) and same error. Same as other posts on this issue. Issue does not occur with any other files (Excel, PowerPoint, Access, Acrobat, etc.) Happens with only Word extensions (docx, etc.) If I open Word and open the file from inside Word, all is fine.

I tried saving documents in different Word extensions, saving to different locations, but still get the error--only when opening directly from Explorer or Desktop. I have repaired Office 2007 (Ultimate Version), uninstalled Word, reinstalled Word; tried the registry fix posted here and MS site (removing Data reg entry under Word). Used tool posted here to unassociate/reassociate .docs with Word. I reimaged my hard drive using an image from two weeks ago, but apparently it started before that, because I still get the same error. I reset my index and waited for it to regenerate. I'm sure there might be other solutions I've tried, but these are the ones that come to mind.

It is a three-week-old Dell 1545 laptop, 64-bit Vista. Not impossible to live with, but has me stumped. According to all the posts in networld and here, fairly common problem that seems to have no single solution.

If anyone knows of new tips, I'd sure appreciate it.

Error is "cannot find (path\name)...before someone yells. Also, thorough scan for malicious software, trojans, etc. Do not have BSPlayer, whatever that is. Also, if I search for the document in the menu, I can't open it from there either.

After hours of attempts, I discovered that--in my case--the problem was a com add-in. I went through and disabled them individually. Finally, after disabling the last one, Word opened a file correctly from Windows Explorer. Doubt this is responsible for many of the instances of this error, but it might be worth trying.

Sometimes you can find a file through Search or Advanced Search when Windows Explorer can't/won't locate it. (See my post of today, Nov 20, 2009 in the "how to search within files" thread, for a thorough discussion of how to use Advanced Search, if you're not familiar with how to use the different Search and Advance Search functions. And more importantly, see Brink's Tutorial for the full scoop: How to Use the Advanced Query Language to Improve Windows Search Results)

Question for you: What exactly are you referring to when you say a "com add-in"?

Had tried that as well. The problem was an add-in macro from third-party software.