I’m running Windows 10.

I have absolutely no idea what is going on. Task Manager doesn’t show anything useful, I killed processes that might be it with no effect. Is there any way whatsoever for me to learn what is causing this and remove it? I ran a Windows Defender scan and nothing showed up.

  • Guys, thank you so much for all the great ideas. Given that everyone made a big effort to help me, I’m a bit embarrassed to report that it looks like it went away? I tried rebooting before and that didn’t help. I rebooted a second time for an unrelated reason and that “fixed” it. I have no idea why. I feel like an idiot now. I will report if it comes back, but, for now, I think that was solved.

    Thanks!