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Performance Test April 2018

Date April 2018
Language English
Last Revision May 9th 2018

Impact of Consumer Security Software on System Performance

Release date 2018-05-09
Revision date 2018-05-09
Test Period April 2018
Online with cloud connectivity checkbox-checked
Update allowed checkbox-checked
False Alarm Test included checkbox-unchecked
Platform/OS Microsoft Windows
Methodology Click here


The Performance Test evaluates the impact of anti-virus software on system performance, as programs running in background – such as real time protection antivirus software – use some percentage of system resources. Taking these tests as reference, users can evaluate their anti-virus protection in terms of system speed (system performance).

For further details please refer to the methodology documents as well as the information provided on our website.

Please note: We want to make clear that the results in this report are intended only to give an indication of the impact on system performance (mainly by the real-time/on-access components) of the consumer security products in these specific tests. Users are encouraged to try out the software on their own PC’s and see how it performs on their own systems.

Tested Products

The following products for 64-bit systems were evaluated in this test:

This test includes both “Antivirus” and “Internet Security” consumer products – both referred to as security products. We have tested the product that each manufacturer submits for the protection tests in the Consumer Main Test Series. Please note that the results in this report apply only to the specific product versions listed above (i.e. to the exact version numbers and to 64-bit systems). Also, keep in mind that different vendors offer different (and differing numbers of) features in their products.

The following activities/tests were performed under an up-to-date Windows 10 RS3 64-Bit system:

  • File copying
  • Archiving / unarchiving
  • Installing / uninstalling applications
  • Launching applications
  • Downloading files
  • Browsing Websites
  • PC Mark 10 Professional Testing Suite

Test Procedure

The tests were performed on a Lenovo G50 machine with an Intel Core i3-4005U CPU, 4GB of RAM and HDD hard disks. We consider this machine configuration as “low-end”. The performance tests were done on a clean Windows 10 RS3 64-Bit system (English) and then with the installed consumer security software (with default settings). The tests were done with an active Internet connection to allow for the real-world impact of cloud services/features.

Care was taken to minimize other factors that could influence the measurements and/or comparability of the systems. Optimizing processes/fingerprinting used by the products were also considered – this means that the results represent the impact on a system which has already been operated by the user for a while. The tests were repeated several times (with and without fingerprinting) in order to get mean values and filter out measurement errors. After each run, the workstation was reverted to the previously created system image and rebooted six times. We simulated various file operations that a computer user would execute: copying* different types of clean files from one place to another, archiving and unarchiving files, downloading files from the Internet and launching applications (opening documents).

We believe that increasing the number of iterations increases our statistical precision. This is especially true for performance testing, as some noise is always present on real machines. We perform each test multiple times and provide the median as result.

We also used a third-party, industry-recognized performance testing suite (PC Mark 10 Professional) to measure the system impact during real-world product usage. We used the predefined PCMark 10 Extendedtest. Readers are invited to evaluate the various products themselves, to see what impact they have on their systems (due to e.g. software conflicts and/or user preferences, as well as different system configurations that may lead to varying results).

Security products need to load on systems at an early stage to provide security from the very beginning – this load has some impact on the time needed for a system to start up. Measuring boot times accurately is challenging. The most significant issue is to define exactly when the system is fully started, as many operating environments may continue to perform start-up activities for some time after the system appears responsive to the user. It is also important to consider when the protection provided by the security solution being tested is fully active, as this could be a useful measure of boot completion as far as the security solution is concerned. Some security products load their services very late at boot (or even minutes later). Users may notice that sometime after the system has loaded, it will become very slow for a little while; thus, it initially looks as though the system has loaded very quickly, but in fact the security product just loads its services belatedly, leaving the system more vulnerable. As we find this misleading, we still do not publish boot times in our reports.

  • We use around 4GB of data consisting of various file types and sizes (pictures, movies, audio files, MS Officedocuments, PDF documents, applications/executables, Windows operating system files, archives, etc.).


File copying: Some anti-virus products ignore some types of files by design/default (e.g. based on their file extensions), or use fingerprinting technologies, which may skip already scanned files in order to increase the speed (see comments on page 5). We copied a set of various common file types from one physical hard disk to another physical hard disk.

Archiving and unarchiving:Archives are commonly used for file storage, and the impact of anti-virus software on the time taken to create new archives or to unarchive files from existing archives may be of interest for most users. We archived a set of different file types that are commonly found on home and office workstations. The results already consider the fingerprinting/optimization technologies of the anti-virus products, as most users usually make archives of files they have on their disk.

Installing/uninstalling applications: We installed several common applications with the silent install mode, then uninstalled them and measured how long it took. We did not consider fingerprinting, because usually an application is installed only once.

Launching applications: Microsoft Office (Word, Excel, PowerPoint) and PDF documents are very common. We opened and then later closed various documents in Microsoft Office and in Adobe Acrobat Reader. The time taken for the viewer or editor application to launch, and afterwards to close, was measured. Although we list the results for the first opening and the subsequent openings, we consider the subsequent openings more important, as normally this operation is done several times by users, and optimization of the anti-virus products take place, minimizing their impact on the systems.

Downloading files: The content of several common websites is fetched via wget from a local server. 

Browsing Websites: common websites are opened with Google Chrome. The time to completely load and display the website was measured. We only measure the time to navigate to the website when an instance of the browser is already started.

Ranking System

Very Fast
The mean value of the products in this cluster builds a clearly slower fourth cluster in the given subcategory
The mean value of the products in this cluster builds a third cluster in the given subcategory
The mean value of the products in this group is higher than the average of all scores in the given subcategory
The mean value of the products in this group is lower than the average of all scores in the given subcategory

Test Results

These specific test results show the impact on system performance that a security product has, compared to the other tested security products. The reported data just gives an indication and is not necessarily applicable in all circumstances, as too many factors can play an additional part. The testers defined the categories Slow, Mediocre, Fast and Very Fast by consulting statistical methods and taking into consideration what would be noticed fromthe user’s perspective, or compared to the impact of the other security products. If some products are faster/slower than others in a single subtest, this is reflected in the results.

Overview of single AV-C performance scores

Vendor File copying Archiving /
Installing /
Launching Applications Downloading Files Browsing Webites
First Run Subsequent Run First Run Subsequent Run
Avast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-veryfast
AVG perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-veryfast
Avira perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-mediocre perf-level-veryfast
Bitdefender perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast
BullGuard perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-veryfast
Emsisoft perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-mediocre perf-level-fast perf-level-veryfast perf-level-veryfast
ESET perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast
F-Secure perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-mediocre perf-level-fast perf-level-veryfast perf-level-fast perf-level-veryfast
K7 perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast
Kaspersky Lab perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast
McAfee perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-veryfast
Microsoft perf-level-mediocre perf-level-mediocre perf-level-fast perf-level-mediocre perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-veryfast
Panda perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast
Quick Heal perf-level-mediocre perf-level-fast perf-level-veryfast perf-level-fast perf-level-fast perf-level-fast perf-level-fast perf-level-fast
Symantec perf-level-fast perf-level-veryfast perf-level-fast perf-level-fast perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-veryfast
Tencent perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-mediocre perf-level-veryfast perf-level-veryfast perf-level-veryfast
Trend Micro perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-veryfast perf-level-mediocre perf-level-fast perf-level-mediocre perf-level-veryfast
VIPRE perf-level-veryfast perf-level-veryfast perf-level-veryfast perf-level-fast perf-level-mediocre perf-level-fast perf-level-fast perf-level-veryfast


Key Slow perf-level-mediocre Medicore perf-level-fast Fast perf-level-veryfast Very fast


PC Mark Tests

In order to provide an industry-recognized performance test, we used the PC Mark 10 Professional Edition testing suite. Users using PC Mark 10 benchmark (PCMark® is a registered trademark of Futuremark Corporation) should take care to minimize all external factors that could affect the testing suite, and strictly follow at least the suggestions documented inside the PC Mark manual, to get consistent and valid/useful results. Furthermore, the tests should be repeated several times to verify them. For more information about the various consumer scenarios tests included in PC Mark, please read the whitepaper on their website.

“No security software” is tested on a baseline vsystem without any security software installed, which scores 100 points in the PC Mark 10 benchmark.

Baseline system: Intel Core i3-4005U machine with 4GB RAM and HDD drive

Summarized results

Users should weight the various subtests according to their needs. We applied a scoring system to sum up the various results. Please note that for the File Copying and Launching Applications subtests, we noted separately the results for the first run and for subsequent runs. For the AV-C score, we took the rounded mean values of first and subsequent runs for File Copying, whilst for Launching Applications we considered only the subsequent runs. “Very fast” gets 15 points, “fast” gets 10 points, “mediocre” gets 5 points and “slow” gets 0 points.This leads to the following results: 

AVC ScorePC Mark ScoreImpact Score
3.Avast, AVG8598.36.7
4.Bitdefender, McAfee8598.16.9
5.Kaspersky Lab8597.87.2
14.Trend Micro7096.723.3
15.Quick Heal6395.231.8

Award levels reached in this Performance Test

The following award levels are for the results reached in this performance test report. Please note that the performance test only tells you how much impact a security product may have on a system compared to other consumer security products (please read the note on page 8); it does not say anything about the effectiveness of the protection a product provides, so please have also a look at the results of recent Real-World Protection and Malware Protection tests on our website.


The on-access/real-time scanner component of anti-virus software runs as a background process to check all files that are accessed, in order to protect the system continuously against malware threats. For example, on-access scanners scan files as soon as they are accessed, while (e.g.) behaviour-blockers add a different layer of protection and monitor what the file does when it is already executed/running. The services and processes that run in the background to do these tasks also require and use system resources. Suite products usually have a higher impact on system performance than anti-virus-only products, as more services/features are included and running in the background.

Security products need to be active deep in the system in order to protect it, e.g. to scan processes and so on that are already active during the system start-up, to identify rootkits and other malware. Those procedures add some extra time and thus a delay in system boot/start up.

If a product takes up too many system resources, users get annoyed and may either disable or uninstall some essential protective features (and thus considerably compromise the security of their system) or may switch to security software that is less resource-hungry. Therefore, it is important not only that anti-virus software provide high detection rates and good protection against malware, but also that it does not degrade system performance or trouble users.

While this report looks at how much impact various Internet security products have on system performance, it is not always the security software that is principally responsible for a slow system. Other factors also play a role, and if users follow some simple rules, system performance can be improved noticeably. The next sections address some of the other factors that may play a part.

A few common problems observed on some user PCs:

  • Old hardware: If a PC already runs at a snail’s pace because it has ten-year-old hardware, using modern (security) software may make it unusable.
    • If possible, buy a new PC that at least meets the minimum recommended requirements of the software you want to use. Multi-Core processors are preferable.
    • Adding more RAM does not hurt. If you use Windows 7, you should use a minimum of 4GB of RAM. If you use Windows XP, Vista, 8 or 8.1, switch to Windows 10 64-Bit.
    • Make sure you have only ONE security program with real-time protection. If your new PC came with a trial security suite, remove this before installing a different protection program.


  • Keep all your software up-to-date: Using an anti-virus version from e.g. 2016 may not protect you as well as the newer version would, even though you may still be able to update the signatures. Please keep your operating system up-to-date by installing the recommended patches. Any software can have vulnerabilities and bugs, so keep all the software installed on your PC up-to-date: this will not only protect you against many exploits and vulnerabilities, but also give you any other application improvements that have been introduced.


  • Clean up the content of your hard disk:
    • 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 accessed files to another (external) disk. Consider buying solid-state drives (SSDs).
    • Uninstall unneeded software. Often, the slowdown that users notice after installing an anti-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 anti-virus scanning).
    • Remove unneeded entries/shortcuts from the Start-Up folder in the All Programs menu.
    • If your PC is already cluttered with residual files and registry entries left over by hundreds of applications you installed and uninstalled after trying them out, reinstall a clean operating 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 return to a clean system without reinstalling everything.


  • 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. A minimum of 15% free space on a hard disk is necessary for effective defragmentation. Please note that defragmentation is not necessary with a solid-state drive (SSD) and can reduce its lifetime.


  • 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 for some time 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!

Copyright and Disclaimer

This publication is Copyright © 2018 by AV-Comparatives ®. Any use of the results, etc. in whole or in part, is ONLY permitted after the explicit written agreement of the management board of AV-Comparatives prior to any publication. AV-Comparatives and its testers cannot be held liable for any damage or loss, which might occur as result of, or in connection with, the use of the information provided in this paper. We take every possible care to ensure the correctness of the basic data, but a liability for the correctness of the test results cannot be taken by any representative of AV-Comparatives. We do not give any guarantee of the correctness, completeness, or suitability for a specific purpose of any of the information/content provided at any given time. No one else involved in creating, producing or delivering test results shall be liable for any indirect, special or consequential damage, or loss of profits, arising out of, or related to, the use or inability to use, the services provided by the website, test documents or any related data.

For more information about AV-Comparatives and the testing methodologies, please visit our website.

(May 2018)