For a couple weeks now, I've been using ACP. It's a great product and it has, on its own, boosted my computer's performance to levels that it's never been at before, but there's one issue that it, apparently, can't fix. For a while now, it's been trying to fix my C drive, but it can't quite get there. It asks me to restart my computer, but when it does, and it boots back up and I open ACP again, the problem's still there. I'm on Windows 7.
After restarting the computer, it attempts to do a disk checkup. Whether or not I let it, it doesn't change the result at all; the problem persists.