A new survey conducted on May 9, 2018, by AV-Comparatives, ταξινόμησε τα antivirus προγράμματα που κυκλοφορούν ευρέως στην αγορά, ως προς τον χρόνο που καθυστερούν την απόδοση του συστήματος σας, για υπολογιστές που τρέχουν Windows 10.
The test was performed on a Lenovo G50 powered by an Intel Core i3 chip, 4GB of RAM and a hard drive. The operating system was Windows 10, with the Fall Creators Update version and all the applications were installed with their default settings. 
AV-Comparatives has performed a number of tasks, including copying files, archiving and removing files, installing and removing applications, launching programs, downloading files, browsing web pages, and PCMark 10 application as reference.
The worst performance was recorded when testing Microsoft's Windows Defender, which comes pre-installed in Windows 10. Windows Defender caused significant drop in performance when copying files and installing applications, with the smallest drop occurring during file downloads. Microsoft's security solution achieved a score of 96,7 on PCMark 10, which is not as good as Avira's 99,4 points, but not as bad as Quick Heal's 95,2 points.
Overall, Windows Defender solemnly finished in last place, while K7, ESET, Avast, AVG, Bitdefender and Kaspersky received the best results.
According to the research, the majority of antivirus solutions had little effect on website browsing performance or file copy, but the greatest slowdown was recorded when launching applications for the first time. Products from Tencent, Trend Micro, Emsisoft and VIPRE slow down systems when launching new applications for the first time.
In a related note, AV-Comparatives states that "although we report the results for the first opening of an application as well as for subsequent openings, we consider subsequent openings more important, since this operation is performed several times by users".
Keep in mind that this research was conducted with a low-end device, so the impact on performance may be significantly smaller in the case of a computer with newer hardware and SSDs.
