Are you having problems resting you HTC ONE M9, i have put up this tutorial to help you rest your htc one m9 screen password fast and easily.

without wasting much of our time follow the steps below to reset your htc one m9 screen password now:

Reset Lock Screen Password On HTC One M9 – Method One
    Use a cell phone to call your HTC One M9
    Pick the call
    While still on call mode, access the Home Screen
    Go to Settings
    Tap Security
    Reset lock password

Reset Lock Screen Password On HTC One M9 – Method Two
    Open Android Device Manager on PC
    Accept tracking agreement
    Find HTC One M9 on the display
    Enable Lock and Erase
    Lock your phone and set a temporary password
    Enter temporary password on HTC One M9
    Set new password

Reset Lock Screen Password On HTC One M9 – Method Three

This is the last resort! If nothing else works, we will fall back the procedure- factory reset HTC One M9, you may lose all your data.
    Press and hold together the Volume Down & Power buttons
    When the three-Android screen shows up, release buttons
    Use the Volume Down button to select Factory Reset
    Tap the Power button