Version Information

P
ROBLEM
:
 
 
 
When trying to encrypt the system partition/drive, during the pretest, the TrueCrypt Boot Loader 
always reports that the pre-boot authentication password I entered is incorrect (even though I'm 
sure it is correct). 
 
P
OSSIBLE 
C
AUSES
: 
• Different state of the Num Lock and/or Caps Lock key 

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115 
• Data corruption 
P
OSSIBLE 
S
OLUTION
:
 
 
 
1. When you set a pre-boot authentication password, remember whether the Num Lock and 
Caps Lock keys are on or off (depending on the manufacturer, the keys may have different 
labels, such as Num LK). Note: You can change the state of each of the keys as desired 
before you set the password, but you need to remember the states. 
2. When you enter the password in the TrueCrypt Boot Loader screen, make sure the state of 
each of the keys is the same as when you set the password. 
Note: For other possible solutions to this problem, see the other sections of this chapter. 
 
 
P
ROBLEM
:
 
 
 
When the system partition/drive is encrypted, the operating system ‘freezes’ for approx. 10-60 
seconds every 5-60 minutes (100% CPU usage may co-occur). 
P
ROBABLE 
C
AUSE
:
 
 
 
A CPU and/or motherboard issue. 
P
OSSIBLE 
S
OLUTIONS
:
 
 
• Try upgrading the BIOS. 
• Try disabling all power-saving-related features (including any special CPU enhanced halt 
functions) in the BIOS settings and in the ‘Power Options’ Windows control panel. 
• Replace the processor with a different one (different type and/or brand). 
• Replace the motherboard with a different one (different type and/or brand).