There is something about your binaries downloads that hangs Windows antimalware service executable. The downloads finish transferring data, but then the browser kicks it over to antimalware service executable to scan, which consumes CPU If you want to temporary disable IDM for single download you may hold Alt button while clicking on the download link to prevent IDM from taking the download.
Jun 25, 2019 How to disable your Mac from automatically opening downloads from is selected; Uncheck the box next to Open “safe” file after downloading.
Full list of changes in Google Chrome releases