User`s guide

same time. For more information, please refer to “Minimal System Requirements”
(p. 2).
● There are too many invalid registry keys left in your Windows Registry.
Cleaning the Windows Registry can improve the performance of your system. For
more information, please refer to “Cleaning Windows Registry” (p. 176).
● Your hard disk drives are too fragmented.
File fragmentation slows down file access and decreases system performance.
Running the Disk Defragmenter can improve the performance of your system.
For more information, please refer to “Defragmenting Hard Disk Volumes” (p.
173).
● The applications running on your system are using too many resources.
The BitDefender Performance Monitor allows you to determine the impact of the
applications running on your system by means of CPU load, memory usage and
hard disk use.
You should be able to pinpoint the applications that are causing the system to
perform poorly, and close or monitor them. For more information, please refer to
“Performance Monitor” (p. 179).
40.3. Scan Doesn't Start
This type of issue can have two main causes:
● A previous BitDefender installation which was not completely removed
or a faulty BitDefender installation.
If this is the case, the easiest solution to follow is to remove BitDefender completely
from the system and then reinstall it. For more information, please refer to “How
Do I Remove BitDefender Completely?” (p. 245).
● BitDefender is not the only security solution installed on your system.
In this case, follow these steps:
1. Remove the other security solution. For more information, please refer to “How
Do I Remove Other Security Solutions?” (p. 243).
2. Remove BitDefender completely from the system.
3. Reinstall BitDefender on the system.
If this information was not helpful, you can contact BitDefender for support as
described in section “Support” (p. 236).
Troubleshooting
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BitDefender Total Security 2011