“My question is: why does my drive activity light just keeps running and running ?”
Mine does that often these days. When I check the processes it’s usually downloading Microsoft updates. If you find your computer doing this on Tuesday or Wednesday when you turn it on, that is a likely cause.
This is like every day, sometimes twice. I’ve disconnected it from the internet but still does it. I’ve had my dad check it and there’s nothing apparently being checked like updates (I’m using W7) - it’s just weird, it’s not scanning for virus’ or running defrag.
I have found that the software Discord chat installs in your machine when you join will do this too. They are Cryptojacking your resources making your machine burn tons of resources it should not be.
I will never hit their server again ever. You have to reinstall your OS to fully get rid of it.