Yes I did in fact do something to make them unhidden forever by accident (Only wanted to hide them OSX too). I dual boot Mac OS X 10.6.8 Snow Leopard and Windows 7. While in OSX I can still access my Windows 7 Hard Disk but my system files showed up as visible in OSX so I used a program to hide them. Then, when I tried to start Windows it said the files were missing so I booted OSX and unhid the files and Windows booted like normal again. I know what I did, I just want to know if anyone can help me hide them again just incase something happens and I don't like seeing them there. I can't hide most of the files only some (e.g. Boot folder).