Use a physical USB device to lock your computer instead of a password. Because each USB device is different, you can see your thumb-drive as a unique car key. Insert a flash drive into your computer, start this software, then remove the USB and the PC will automatically lock until you put it back in.
Lock and Unlock Your PC With USB Drive Software Description
Publisher: Visit Website | Download
Category: Utilities > Disk Utilities
OS: Windows 2000