zlacker

>>mconle+(OP)
I've experienced a bug related to the on-disk real-time scanning of Windows Defender, but instead with 100% disk bandwidth usage for unreasonable amounts of time.

I purchased a license of a proper antivirus software to avoid that bug and the performance issues gone away.

When you install another AV software, Windows Defender steps down and leaves scanning to the 3rd-party security solution. I selected one of the most lightweight ones I could find. It has been a net win for me.

One shouldn't need to do this, but it has worked so far, for years now.

>>ivanmo+za
I stopped using windows and moved to Fedora and Mac when I faced the same issue you faced. Cannot trust windows after shipping this perf bug and the modern standby bug.