If it ain't broke, don't fix it, except in this case, if it ain't broke, break it. :^) The W7 Pro machines we use (and as an employee of a pretty large outfit, I've got zero to say about what we use around there) have started to run noticably slower during the past month or so.
You're not alone. Something's going on.
[Dayglored puts on his tinfoil hat...]
You have to wonder if some Win7 Windows Update from months ago included a "timebomb" that would start the disintegration of performance after Jan 14, 2020.