The built-in utility reduces the performance of 8th and 11th generation Intel processors by 6% at once.
According to PC Gamer, Kevin Glyn, a developer of benchmarks and programs for optimizing the performance of RealTemp, ThrottleStop and Counter Control computers, in the course of his work noticed that Windows Defender simultaneously runs almost all Intel Core hardware performance counters. It is noted that other anti-virus utilities do not use all the capabilities of the processor.
This is not such a big problem for the operating system itself, although sometimes Windows Defender may conflict with other programs that also use counters in their work. In addition, Glyn noticed that while running the built-in antivirus, the performance of his Intel Core i9 10 850K processor drops by about 6%.
It is possible that such a problem is observed on all processors of the American IT giant that were released after 2007.