Time for a new free virus scanner - advice?

[Buster's Uncle]

Odd - I uploaded an upgrade of my avatar earlier, spotted a detail I'd missed, fixed and resaved - and the browse button to re-upload the improvement had stopped working in about two minutes, and I got the popup blocker warning bar at the bottom, though the popup blocker is turned off...

[Buster's Uncle]

Stupid MSEdge doesn't have the problem, so I workarounded that way...

[Buster's Uncle]

I can report that the embedded video problem is there in Edge and Chrome, too, so presumably a direct OS problem.  I need to fish the Great Satan Firefox out of my old drive and check that, too...

[Buster's Uncle]

Very odd - just checked, and now the browse button works again - I hadn't done anything.

[Buster's Uncle]

The embedded video display problem is definitely something to do with Flash - when I right-click on where they should be, I'm getting a Flash settings popup.  I guess I better google it...

[Buster's Uncle]

Tried some things from a Microsoft website - no luck so far, despite a reset.

[Buster's Uncle]

...I'm getting one of those bottom of the screen "An add-on for this website failed to run" bars across the bottom of the screen when I try to fix things...

[Buster's Uncle]

Irritating thing is, some problems come and go in the course of a day in tabs that have been open the whole time.  -A new one as of sometime yesterday is the Quick Reply box twitching back and forth between two widths as I type, which is maddening as the second line moves back and forth.

The video display cleared up mysteriously sometime late afternoon...

[DrazharLn]

If IE and Edge aren't working, try Firefox and Chrome for a while and see if the errors are there too.

[Buster's Uncle]

[shudder]  Chrome ain't so bad, but Firefox is teh Great Satan...  I have both working, and we'll see.