Windows Media Center Setup Changed Permissions Of Music Folders

I've had an xbox for several years now. A few years ago I set up my computer to stream music to my xbox. It was cool for awhile and it worked fine, but eventually I just stopped using it. Today I decided I would use it again, but I found that wasn't working. No problem, its been a few years and sometimes settings just get lost. I go out on the web to find a guide again that would tell me how to do it, which led me to [URL]. At the part where I name my library and hit "OK", my "OK" button is grayed out. I know I could try and set up windows media center again. Again, I went to Xbox's support at [URL]. Everything was set up fine and dandy and everything worked.

I get back on my desktop to check something in my "My Music" folder. I get the "You need administrative privileges pop-up", which i thought was weird but i hit continue and it worked fine. Now, whenever i try to open ANY folder, sub-folder, or file, not only does it try to tell me I need admin privileges, once i hit continue it says that i don't have permission to that folder, etc. I think that if I were to go in and reset all the permissions that everything would be fine, but I've got a pretty large library and it could take forever to do that. Is there a simpler way, or a setting that I can change so that Windows Media Center doesn't block me from my own files?