Here we go again. Last year managed to create shares and gain Windows 7 access to drives on XP PC. All was well. Just installed a new drive on XP and now cannot gain full access from Windows 7. Windows 7 sees the drive and folders, but will not open folders or individual files. New drive in XP is set to share and allow users to change files. When I try to change permissions in Windows 7 (to total control for everyone), first I am warned it would be better to change access locally (access is already total). When I try to proceed to change permissions anyway, I get an error message: "an error occurred while applying security information...access denied." The same happens when I try to change ownership of the XP drive from the Windows 7 machine. Meanwhile, I have no problem accessing the 2 other XP drives. The new XP drive is NTSF formatted with a single basic partition. Thanks for any help.