One thing we found that severely impacted performance on Windows was the built-in anti-virus software (Windows Defender).

This came to our attention when we found one of our programs ran dramatically better on Windows 7 than 10 and we traced it back to the 7 machine not having Defender installed. We ended up optimizing our IO behavior to avoid triggering Defender and it made a huge difference.

This leads me to wonder how many of these benchmarks suffer on Windows from similar problems or if Defender was disabled how much of a difference it would make.