There's nothing guaranteed to annoy an IT department or cyber cafe owner more than someone who wants to install or remove files from their precious PCs. Then again, it can also be pretty infuriating for anyone looking after schools or family systems too.

DeviceLock could be the answer, so long as the PC is running Windows NT, 2000 or XP. It allows the administrator of that system to assign rights on all drives, and even the serial and parallel ports.

You can specify full access, no access, prevent ejecting, or combinations of the above, during specific times of the day and week. It's also possible to selectively change these rights depending on who's logged in at the time.

DeviceLock can also be used to flush the buffers of a drive, and everything can be operated remotely for the administrator who likes to make their presence felt.