Hello, I am using a pc at work with Windows XP. I have an administrator account, but also the administrators can access this computer with their accounts. I copied a large folder containing projects and documents from another external usb hard disk into a subfolder located in the desktop. I double clicked that folder and changed some security settings in order to prevent the other administrators to access that folder. Windows issued a warning saying that when changing the security settings for a group of users, it may affect other users too. Unfortunately I did not care and clicked yes. I logged out, then I logged in again, and now I can access the folder but it looks empty! all the files have totally disappeared, also in safe mode. They are not found by the "search tool", they are not in the recycle bin, and they were not found by FreeUndelete software. Please Help! What can I do to get those files back? *** EDIT: *** I was able at least to see the files by searching the entire volume c:\ for any file created on the correct date. They are also visible through the disk-space-analyzer software TreeView. Rather strange that through explorer they are still not visible, and also by using 'dir' on the command prompt displays a seemingly empty folder (0 bytes) :-/ I am now trying to copying them into another new folder. If everything goes fine I wont reply here anymore.