I recently bought the mac mini so that I would be able to use multiple computers at once. However, literally the following day my MacBook air got extremely slow for no reason, I didn't drop it or anything. There may have been an overnight update. I have been using my MacBook with 2 monitors and 7 apps running smoothly for the past 4 years and now out of nowhere it got slow in a single day? Please help me out this is insanely frusterating and should never happen as I took such good care of my macbook.
For Reference: MacBook Air 2015 (image for details)