So, after a failed Windows 7 install, I put XP back on, and had a adrenaline shot when I got an access denied on a couple of my backed up folders. I already tried the instructions here at Microsoft KB, but it didn't fix it. I did add myself with full permissions on the main section of the Security tab, though, and that gave me access into the folder (I could do it in XP Home because of the Windows NT SP4 Security Configuration Manager). However, it appears some subfolders are still inaccessible.
Two questions, then. Why exactly did this happen and how do I fix it?