this is probably worth around the three year mark. tip: the ideal way to do this is to purchase a new hard drive and start from scratch on that one. you can still keep your old one plugged in and boot to either one. that way, it’s much easier to transport your ’stuff’ over, and it also gives you the flexibility to log into your ‘older’ system if need be.
there are a lot of other things you can do, but this is a few things that might help extend your computer life. in this day where we’re holding onto things longer (a good idea), hopefully this helps get you started. 