Is it possible to read or write data on a NTFS disk from another OS?
Yes. There are at least two different OSes that is capable of this, MS-DOS and Linux. It is possible to use the NTFSDOS.exe program from MS-DOS to read information of a NTFS formatted disk. 2.4 RegistryAs shipped from Microsoft, most versions of NT have very weird access control list settings on the system registry keys. Some registry keys have had permissions that let everyone access and change them over the network. Dan Shearer