I have a Mac Pro (early 2009 Quad Core" 2.66 Nehalem) with two hard drives. On one drive I have my Mac OS and files, and on the other hard drive I have installed Windows XP in Bootcamp. I also have a Macbook Pro (early 2008 Core 2 Duo" 2.5). My problem is that I am unable to open in Bootcamp certain types of Mac Pro files that are located on my Mac OS drive. However, I can see and navigate to all these files in Bootcamp. What's more I can open certain types of files in the very same folder as files that I can't open. For instance I can open TXT files, PDF files, JPEG files, and HTML files. But I can't open DOC files, XLS files, PPT files, or QDATA files. What's more the very same file types that I can't opened in Bootcamp when they are on my Mac Pro, can be opened in Bootcamp when they are stored on my Macbook Pro. I'm sharing all my files on the Mac OS side, and I can open all Mac OS and Bootcamp drive files on my Macbook Pro when I am booted to Mac OS on the Mac Pro. However,when running Bootcamp on the Mac Pro the entire Mac OS drive is invisible to the Macbook Pro, although files on the Bootcamp drive can be seen and accessed. I think that my problem accessing Mac OS files in Bootcamp may be some type of funky Network permissions problem, but I can't figure out what it might be - and I've been trying for days. The whole pattern of the problems just don't make sense to me. If anything, I would have expected that Bootcamp access of Mac OS files would be simple and direct from the machine that hosts Bootcamp. If sharing problems were to occur in Bootcamp, it would seem more likely that it would be in accessing files from the Macbook Pro and not the other way around. Any suggestions would be most welcome. I've spent a lot of time trolling the web for help - and have not been able to find any solutions. I think I'm doing everything that I'm suppose to do to get the sharing to work, and have run out of ideas.