By using FLock, you can limit user access to those WindowsNT resources that are initially "defenceless" such as floppy disk drives, CD-ROM drives, parallel and serial ports of the computer. FLock advantages: It is implemented as a driver, its protection acts just from the system loading. FLock takes only a few system resourses and doesn't load the processor, because it doesn't participate in input-output operations. Existing analogs such as Device Lock are made as services and accordingly they are permanently in the memory and distract the processor. FLock additional features: Protection of drives, CD-ROM, ports. Remote Administration Separate permissions setting on listening to audio CD and reading of CD data. Blocking of CD-ROM tray that is unaccessible for a user.