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Troubleshooting 
It is recommended that you read also the latest online version of this chapter at:
http://www.truecrypt.org/docs/?s=troubleshooting
 
 
 
This section presents possible solutions to common problems that you may run into when using 
TrueCrypt.
Note: If your problem is not listed here, it might be listed in one of the following sections:
• Incompatibilities 
• Known Issues & Limitations 
• Frequently Asked Questions 
 
Make sure you use the 
latest stable version
 of TrueCrypt. If the problem is caused by a bug in 
an old version of TrueCrypt, it may have already been fixed. Note: Select Help > About to 
find out which version you use. 
P
ROBLEM
:
 
 
 
Writing/reading to/from volume is very slow even though, according to the benchmark, the speed of 
the cipher that I’m using is higher than the speed of the hard drive.
P
ROBABLE 
C
AUSE
:
 
 
This is probably caused by an interfering application.
 
 
P
OSSIBLE 
S
OLUTION
:
 
 
First, make sure that your TrueCrypt container does not have a file extension that is reserved for 
executable files (for example, .exe, .sys, or .dll). If it does, Windows and antivirus software may 
interfere with the container and adversely affect the performance of the volume. 
Second, disable or uninstall any application that might be interfering, which usually is antivirus 
software or automatic disk defragmentation tool, etc. In case of antivirus software, it often helps to 
turn off real-time (on-access) scanning in the preferences of the antivirus software. If it does not 
help, try temporarily disabling the virus protection software. If this does not help either, try 
uninstalling it completely and restarting your computer subsequently. 

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