Appendix B. Frequently Asked Questions - KAPERSKY ANTI-VIRUS 5.7 - FOR LINUX FILE SERVER Administrator's Manual

APPENDIX B. FREQUENTLY
ASKED QUESTIONS
This chapter is devoted to questions most frequently asked by users regarding
the installation, setup, and operation of Kaspersky Anti-Virus. We will try to
answer them here in detail.
Question: Can Kaspersky Anti-Virus be used with other vendors‟ anti-
virus software?
To avoid conflicts we recommend that you remove any third-party anti-
virus software before you install Kaspersky Anti-Virus.
Question: Kaspersky Anti-Virus does not rescan files. Why?
In fact, Kaspersky Anti-Virus does not rescan file that have not been
modified since the last scan.
This is possible due to the use of new technology iChecker™. This
technology is implemented utilizing the objects' checksums database.
Question: Why does Kaspersky Anti-Virus cause a certain decrease in
my computer performance and impose a considerable load on the pro-
cessor?
The process of virus detection is a computational (mathematical) task
that involves analysis of structures, checksum calculation and mathe-
matical data transformation. Therefore, the main resource consumed by
the anti-virus software is the processor time. Moreover, each new virus
added into the anti-virus database adds to the overall scanning time.
Other anti-virus software vendors try to reduce the overall scan time by
cutting the number or types of files scanned – by excluding from their
databases viruses that are less easily detectable or less frequent (in the
particular geographic location), and file formats that require more com-
plicated analysis (e.g. PDF files). Kaspersky Lab believes that the pur-
pose of an anti-virus program is to deliver to its users a genuine anti-
virus security.
Kaspersky Anti-Virus allows experienced users to accelerate the anti-
virus scanning process by disabling scanning of various file types. How-
ever, note that this lowers the security level.