@Drew, I have the paid for Avast Internet Security, and having been very content with it for a year, I just paid for a three years license. I also have Malwarebytes, Pro version = paid for. I strongly believe in the principle You get what you pay for, and some of my experiences with freeware are bad, due to lack in support etc. Doesn't go for Microsoft --- that's paid for, after all, eh?
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My choice of topic wasn't the best one, seemingly. My intention was not to put Windows Defender versus Avast, in terms of which is better, we have quite enough of these "Which is the best antivirus software", and no one has truly presented a definite answer, most probably because there is none?
I just wanted to make a comment, in case it might have been a more common problem. Like once when a Windows update conflicted with ZoneAlarm, leading to lots of trouble... and since I lost my Internet back then... I re-installed Windows, and finally that turned out to have been unnecessary.
Perhaps I didn't hit it very well, or meet the spike at the point, perhaps I'm slightly paranoid, but what the heck, communication is always good.
But this was NOT meant to be a comparison of security software.
Have a good and bright Midsummer, all of you!