Appendix B. Frequently Asked Questions - KAPERSKY ANTI-VIRUS 5.5 - FOR LINUX-FREEBSD WORKSTATION AND 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?
In order to avoid conflicts we recommend that you remove any third-
party anti-virus software before you install Kaspersky Anti-Virus.
Question: Kaspersky Anti-Virus doe not rescan file. 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
processor?
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.
Unlike other anti-virus software vendors that try to reduce the overall
scan time 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 complicated analysis (e.g. PDF files),
Kaspersky Lab believes that the purpose of an anti-virus program is to
deliver to its users a genuine anti-virus security.