Anti-Virus Comparative - Performance Test (Internet Security Products) – October 2014 www.av-comparatives.org
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- Clean up the content of your hard disk:
o If your hard disk is almost full, your system performance will suffer accordingly. Leave at
least 20% of your disk space free and transfer your movies and other infrequently ac-
cessed files to another (external) disk. If money is not an issue, consider buying solid-
state drives (SSDs).
o Uninstall unneeded software. Often, the slowdown that users notice after installing an an-
ti-virus product is due to other software on the PC running in the background (that is,
due to software conflicts or heavy file access by other programs, each access requiring an-
ti-virus scanning).
o Remove unneeded entries/shortcuts from the Start-Up folder in the All Programs menu.
o If your PC is already messed up by residual files and registry entries left over by hundreds
of applications you installed and uninstalled after trying them out, reinstall a clean oper-
ating system and install only software you really need (fewer software installations means
fewer potential vulnerabilities and conflicts, and so on) and use e.g. an image/backup
tool in order to ensure that you do not have to reinstall everything manually in future.
- Defragment your hard disks regularly: A fragmented hard disk can have a very big impact on
system performance as well as considerably increasing the time needed to boot up the system.
Please note that this does not apply to solid-state drives (SSDs).
- Fingerprinting/Optimization: most anti-virus products use various technologies to decrease their
impact on system performance. Fingerprinting is such a technology, where already scanned files
do not get rescanned again for a while (or more rarely) or are whitelisted. This increases the
speed considerably (especially after a longer period of PC usage), but also adds some potential
risk, as not all files are scanned anymore. It is up to the user to decide what to do. We suggest
regularly performing a full-system scan (to be sure that all files are at least currently found to be
clean, and to further optimize the fingerprinting).
- Be patient: a delay of a few additional seconds due to security software is not necessarily a big
deal. However, if even with the suggestions above the performance of your PC still annoys you,
you should consider trying out another anti-virus product. If you only notice a slow-down after
using the anti-virus for a long time, there are probably other factors behind the slowdown. Never
reduce your security by disabling essential protection features, just in the hope of gaining a
slightly faster PC!
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