Hi, For some specific purpose, I have created a VHD, connected it as NTFS drive F:\ and Turned ON bit-locker on it. BitLocker is set to use password to unlock the F:\ Windows 7 Ultimate has two Admin accounts say admin-1 and admin-2. I want to keep this F:\ drive unlocked and accessible within admin-1 account only. When admin-1 logs-off or locks computer with WinKey+L the bitlocker F:\ drive must become in locked state. For any other user like admin-2, F:\ should be locked and must ask password for access. But when admin-1 re-logs-in or unlocks its computer, F:\must be accessible. I am aware bitlocker has nothing to do with user accounts and privileges. I tried the CMD batch file as: manage-bde -lock F:\ -forcedismount bat file works fine manually under admin priviliges and re-locks F:\ in any account. But I am looking same solution to happen at admin-1 log-off or computer lock. I got idea about creating a sched task to run the bat file above but I can't find any trigger to start that bat file at user log-off or computer lock. Please suggest how is it possible?