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Note: This is completely unrelated to the program offered on TuCows and CNET, I named it without ever checking the title, and I may decide to change it at will. What Does it do? This program allows you to require a specific drive (USB preferably) to be connected to the computer to gain access while the program is running. Downloads: USBLock.zip (Includes Source code, Compiled version, and English .LANG file) UPDATES: (click "see post" to see notes on changes) Version 6: see post Version 5: see post Version 4: see post Version 3: see post Version 2: see post ----------------------------------- -How does it do it? 1a. On a normal run, the program will ask you for a drive letter to assign as a "Key Drive". 1b. A drive letter is assigned by command-line parameter. 1c. The "auto" parameter is used, and we skip to Step 4. 2. The Program will then generate a random keyfile, save a hash of the keyfile locally and save the actual keyfile on the root of the chosen/validated drive. 3. Waits until the keydrive is removed. 4. BlockInput is called 5. Then the program then checks repeatedly for the existence of the keyfile on all drives 6. The keyfile is validated, if it is valid, BlockInput is released and we return tp Step 2. 7. Assuming the keyfile is invalid, it is deleted and we return to step 5. Note: There is a special keyfile that can be saved on a drive that will shut down the program to allow emergency access. (if you edit the emergency text in the script, you will need to edit your own emergency keyfile) USBLock_Emergency_Keyfile.zip Requirements: WindowsConstants.au3 GUIConstants.au3 StaticConstants.au3 String.au3 Misc.au3 myToast.au3 - by me (given) MD5.au3 - which is either by: - Ward (Using CallWindowProc; I suggest this one.) - Frez Systems Ltd and SvenP (all AutoIt) - Other Credits: Monitor On/Off Example - MrCreatoR MD5 - SvenP or Ward ... let me know if you were missed for credit. EDIT: fixed the "steps" explanation 5-5-13 Edit: Re-added images to post