For the last 3 days my computer has been "thinking" nonstop.
The hard drive is constantly making the scratchy noise as if it's doing some intensive processing.
I've defragged, and done disk cleanup, used SeaTools and done CHKDSK but it doesn't help. I have no malware or viruses either.
This has happened 2 years ago but I forget what the solution was. I either did something specific or it went away on its own.
The noise is really, really annoying.
It's only quiet when it's off or sleeping.