I reported a similar bug a month ago or so. I was told 10.2 should fixed this issue.
Tech provided bug ID 1129539, which relates to article below:
Probably unrelated but we had a similar issue with Windows 10. Our solution was to remove windows defender from the startup items. in Windows 10. We did hear that it may be fixed in 10.2 also however it was a nuisance and we shut it off.
Also I noticed you had posted in the other thread about performance issues in 10.1. I just updated with our findings about pre fetch.