Version Information

P
ROBLEM
:
 
 
 
One of the following problems occurs: 
 
• A TrueCrypt volume cannot be mounted. 
• NTFS TrueCrypt volumes cannot be created. 
In addition, the following error may be reported: "The process cannot access the file because it is 
being used by another process."
P
ROBABLE 
C
AUSE
:
 
 
 
This is probably caused by an interfering application. Note that this is not a bug in TrueCrypt. The 
operating system reports to TrueCrypt that the device is locked for an exclusive access by an 
application (so TrueCrypt is not allowed to access it). 
P
OSSIBLE 
S
OLUTION
:
 
 
It usually helps to disable or uninstall the interfering application, which is usually an anti-virus utility, 
a disk management application, etc. 
P
ROBLEM
:
 
 
 
In the TrueCrypt Boot Loader screen, I’m trying to type my password and/or pressing other keys 
but the TrueCrypt boot loader is not responding. 
P
ROBABLE 
C
AUSE
:
 
 
 
You have a USB keyboard (not a PS/2 keyboard) and pre-boot support for USB keyboards is 
disabled in your BIOS settings. 
P
OSSIBLE 
S
OLUTION
:
 
 
You need to enable pre-boot support for USB keyboards in your BIOS settings. To do so, follow 
the below steps: 
Restart your computer, press F2 or Delete (as soon as you see a BIOS start-up screen), and wait 
until a BIOS configuration screen appears. If no BIOS configuration screen appears, restart (reset) 
the computer again and start pressing F2 or Delete repeatedly as soon as you restart (reset) the 
computer. When a BIOS configuration screen appears, enable pre-boot support for USB 
keyboards. This can typically be done by selecting: Advanced > ‘USB Configuration’ > ‘Legacy 
USB Support’ (or ‘USB Legacy’) > Enabled. (Note that the word ‘legacy’ is in fact misleading, 
because pre-boot components of modern versions of MS Windows require this option to be 
enabled to allow user interaction/control.) Then save the BIOS settings (typically by pressing F10) 

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and restart your computer. For more information, please refer to the documentation for your 
BIOS/motherboard or contact your computer vendor’s technical support team for assistance.