Thanks for your reply. I ought to have explained that there are two hard discs. The first has a single partion, C drive, with Windows 2000, but is not set up for anything other than looking at the second hard disc. D drive is the primary partition on the latter, with a separate copy of 2000. D drive is the system drive used for all normal operations and, apart from the operating system, contains only software that cannot be loaded on other drives. Booting on C drive, as administrator, enables me to manipulate D drive a little more than would otherwise be possible.