Operation Manual

109
Troubleshooting
This section presents possible solutions to common problems that you may run into when using
VeraCrypt.
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
PROBLEM:
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.
PROBABLE CAUSE:
This is probably caused by an interfering application.
POSSIBLE SOLUTION:
First, make sure that your VeraCrypt 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.
Make sure you use the latest stable version of VeraCrypt. If the problem is caused by a bug in
an old version of VeraCrypt, it may have already been fixed. Note: Select Help > About to find
out which version you use.
It is recommended that you read also the latest online version of this chapter at:
https://veracrypt.codeplex.com/wikipage?title=Troubleshooting