I've read that a lot of people are having this problem, but nothing I try works. Disk usage will remain low until I launch a program like Skype. When I do, it will say that Skype uses around 1 megabyte, which is apparantly 100% of my disk capacity. Response is slow and I can't really do much. I've gone into task manager and I've checked what I/O is reading and writing the most, and before I disabled it, it had been Windows Search, and after, it seems it's SVChost and System.
It's definitely not malware or anything-- I've formatted and reinstalled my entire computer, which I had hoped would fix the problem. It didn't. I am sitting here with a fresh install of Windows 8, a powerful computer, and still it is freezing up. I really need your help, guys! It's driving me nuts.